My friend and I stayed at Casa Linnea in October, 2010. Both of us have stayed in several B/Bs in Europe and the United States.

The good news: Location, location, location! This bed and breakfast is situated quite well and within walking distance of major historical sites and museums. Restaurants and shopping are very near. The proprietor provided very helpful maps and area advice, as well as calling her private driver for our transfer to the airport.

The bad news: Awful beds and NOISE!!!! Not street noise, but noise within the building and within the B/B itself. The room windows opened to a 6-floor atrium that was a virtual echo chamber, and we could hear every dish being washed, television show being watched, and every child’s cry or dog's bark (and one dog barked constantly). There was a bathtub above our room, and we could hear every time someone got in to or out of the tub. To make matters worse, even after 10-12 hours of walking daily, I was never quite exhausted enough to sleep well in the bed. I began calling it “The Evil Bed.” My friend used a sleep aid. There was simply no way to recover from the day in a bed so awful; not only was it uncomfortable, it was sized for a 12-year old.

Although the proprietor indicated free WiFi, she could not name the network and was baffled when it (whatever its name) was not available. Reiterating other reviewers' comments, breakfast was a choice of sweet roll or cereal. No single-use soaps or shampoos were offered. In this day of liquid restrictions on flights, these little conveniences would have been appreciated.

I've stayed in other B/B's in Italy where much more is offered for much less, to the point of feeling spoiled. I would not recommend even a brief stay at Casa Linnea in Rome.

I chose this B&B based on TA reviews, and for its location. My wife & I stayed here for 4 nights, and it had it's pros & cons:

Pros:

This is a converted apartment, and it makes you feel like you've moved to Rome and are living with the locals. It feels more alive and integrated than staying in a traditional hotel, which I really enjoyed.

The location is excellent. It is a 15 minute walk to Vatican City, 20 minutes to Piazza Navona, and only a 5 minute walk to the Metro for any other locations you may want to visit.

Another plus about the location. It is just off the shopping district which means it's a middle / upper class area and feels very safe (though I've never encountered a part of Rome that I felt was dangerous).

The kitchen has a coffee maker, fridge, stove, oven, and dinnerware in case you want to bring home your own food. It's not clear whether we were allowed to use the stove & oven, so ask first if you're thinking about it.

Cons:

As this is a converted apartment (multi-story building with courtyard), some of the neighbors across the courtyard were quite loud and didn't seem to care that their yells echo very loudly into all of the other apartments.

The water pressure in the shower was dismal.

The supplied breakfast is nothing more than basic twisted bread and an assortment of jellies/jams. However, there is also milk & juice in the fridge that's replenished as needed.
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As previously stated, the rental is a converted apartment. There is a shared kitchen & dining room, then (three, I believe) bedrooms with private bathrooms. With only three rooms, it mostly feels like you have the place to yourself. Only twice did I encounter fellow renters in the B&B, and they were considerate & quiet when coming & going.

We stayed at Casa Linnea at the beginning of our trip to Italy because we wanted to be in walking distance to the Vatican. For that, it was very very good. We also walked to Piazza Navona, the Jewish quarter, the Pantheon, the Trevi Fountain, the Spanish Steps, and Piazza del Populo.

The accommodation itself is very simple. Our room was on a quiet courtyard on the first floor of a 19th-century building. The bathroom was large, and there was a separate WC, which meant we had two sinks, which we liked. We had two folding chairs, but at least we had chairs. There was another bedroom in the apartment, so renting both rooms could be convenient for a family or two couples traveling together. We could not get internet access in our apartment, but apparently Casa Linnea has another apartment that does pick up free internet access. The hostess was not tech savvy.

As other reviewers have noted, breakfast was disappointing--cereal, milk, juice, and bread for toast. On the first morning the hostess brought us each a fresh croissants, but on the second day there were just two pastries wrapped in plastic. The Nespresso machine was convenient once we learned that it had to warm up for several minutes.

The accommodation is more like a private apartment than a B&B. We wanted to communicate with the hostess about leaving our luggage after check out, but the only way to do that was to telephone her or use the intercom at the front door downstairs.

We appreciated her recommendation to use the travel agency across the street to make train reservations rather than going back to the train station to do so.

Casa Linnea is located 5 minutes walk fro Castle St Angelo and 10 minutes walk from the Vatican. My wife and I stayed here for 3 nights at the end of June and walked to both locations as well as Piazza Nova (great square to enjoy dinner), the Spanish Steps and the Pantheon. The room was comfortable with private bathroom and ours had a little patio. The only disappointment was breakfast which consisted of a couple types of cereal and toast. Everything was there but not prepared, you made your own coffee, toast, and cleared the table. I would definitely recommend to friends because of the location but let them know about the breakfast.