As hotels go this one is very difficult to compare with others. The hotel has a number of unique features. We were in Room 6 in a circular grass roofed building. The furnishings were basic but exemplified local craftsmenship with detailed Viking motif wood carvings. There was beautiful piped music into the room and a large skylight which gave a beautiful view of Kjelsfossen and the surrounding towering mountains. The hotel is situated at the end of Naeroyfjorden which had a lovely outlook.
However that was the end of any positive experience. The hotel was advertised to be in a quiet isolated location; alas we pulled up to find a car ferry terminal within metres of the hotel and a large crowded carpark full of tourist buses and checkin was a small counter next to a bar in a second grassed roof building dominated by a souvenir store. It turned out the hotel was as much a tourist attraction in its own right as a place to stay. Tourists were literally walking into your room to gawk, which probably helped explain why our room was missing the trademark reindeer skin on the bed.
The lack of privacy meant most rooms either looked out onto the carpark, souvenir store or the ferry terminal. We negotiated a room looking south, the only problem with this was that the hot summer sun beat down through the skylight for most of the day, and without any shutters on the skylight the room was an absolute oven and unusable. Relaxing let alone sleep was difficult to come by here.
Food was hit and miss. The breakfast buffet was a small affair. The lunch menu was cafeteria style, although our dinner was one of the best meals we had in Norway. We had pre-arranged a set three course meal. It used local produce and was worth the price as was the view from the terrace straight down the fjord. This setting was made more pleasing as it was 6.30pm and the last of the car ferries and tour buses had departed for the day. For a brief while we could enjoy the hotel in the peaceful setting we expected.

This hotel is situated at the end of a most beautiful fjord and can be reached by boat and road. Nearby is the longest road tunnel (over 25kms) and fjord in the world. All very picturesque but miles from anywhere. Only one restaurant and gift shop in the area.
The hotel is a single story building with a grass covered roof and amazing furniture and coverings inside each room. However, the heating system can be overpowering if a resident requests a rise in temperature. the temperature was at least 90C on the first of two nights I stayed there because a tourist insisted on a warmer room and there are only central controls. This means everyone has to suffer the extra heat!
The dinner food was mediocre and the menu very limited - I had not had reindeer burgers before, not do I wish to repeat the experience! The breakfast was much more acceptable.
If you have a choice to stay in Flam or Gudwangen in this area, I would certainly recommend the former - just visit Gudwangen.

The Gudvangen Fjordtell as a structure is thoroughly well described in another review here, so I will refrain from repetition.

However, what bears repeating is that the town of Gudvangen is very remote feeling. It takes only minutes by car to get to restaurants, shopping, and entertainment, but when you are in Gudvangen, it's all about communing with nature. The Fjordtell is the one and only option for lodging, dining, and shopping (with the exception of the gas station's mini-mart across the river). It's quiet and peaceful here, and it's a perfect place to commune with the surroundings and take in the awesome wonder of it all.

What bears introducing to the previous two postings is:

The grass-roof rooms have music piped in through a universal sound system, and it's a beautiful addition to the atmosphere. Think of Enya floating across the water as low clouds drift silently between mountain peaks. Heavenly.

We loved the skylight in the room that afforded us a beautiful view of the mountain tops and a gorgeous waterfall. Until we found that there was no curtain or blind system for the giant ceiling window, which created some challenging sleeping conditions in a place where it doesn't get dark at night.

We ordered a FjordPass online, which gave us a discount at the hotel and paid for itself many times over. Reservations through Fjord-pass were easy, but be sure to print and carry your reservation confirmation and the pass itself, and show it at both check-in and check-out, or you may be glossed over and charged full price.

The dining at the hotel is a gamble. The buffet breakfast that's included with the room was good with bread, cheese, deli-style meat, cereal, fruit, and make-your-own waffles that were particularly tasty. Dinner, on the other hand, was nothing we recommend. We ate here four nights, for lack of any other options, and of 8 meals tried, only 2 surpassed the unkind definition of "cafeteria food". And the dinner prices were painfully high, even in light of the generally astronomical price of food in Norway. In neighboring towns we ate twice as good for half the price. As is often true, the very things that make a place perfect (peaceful isolation) are also what make it difficult (no other options).

Three photos of our room (#4) are attached to this review.

Really, you've nothing to do there if you like night life or so. Otherwise, it's definitely a place to visit. Feel yourself a hobbit living in a room with a grass roof. We've had a room with waterfall view - absolutely marvelous. If you want to slow down life pace for a while this is the best place to do that.