The good:
-Best location, in the center of Mariscal but off to the side so you don't suffer any of the night noise.
-A great breakfast is included.
-Internet is free and available.
-TV is included with english channels to keep up on home news.
-Awesome and friendly staff.
-Rooms are inside the hotel and away from the street so no street noise.

The Bad:
-No parking but who cares in Quito

We only stayed one night here before our early am flight . La Casa Sol is a very nice and cozy place to stay. It's decorated very nice and the service is wonderful. Very easy to arrange a transfer and the staff offered our breakfast to go and had coffee waiting for us at four am. It's in a great area for grabbing a coffee or something to eat. The only downside to this hotel is of course the noise from the street. Even at four am when we were leaving... still people were walking, singing ect...

We stayed at Casa Sol for a few nights before a Galapagos trip. It is a pretty colonial style building in the 'Gringoland' area of Quito.

It's handy for all the bars and shops, but a lot of people did mention the safety factor and there are certainly some sketchy characters who wander around this area. We didn't have any problems, but the area didn't feel all that safe.

As for the hotel, our room was nice, but a bit weird. For example, we had a big flat screen TV mounted on the wall, but the power lead wasn't long enough to reach the plug! Seemed a bit odd... There's a great collection of books, but when we tried to swap one the staff seemed a bit confused - they virtually accused us of stealing.

It is also quite a noisy area, so we didn't have the best quality of sleep. I think Casa Sol charges very high rates - probably because it's featured in so many guide books. There are much cheaper options in the area, which probably give you a similar standard of accommodation for less.

Rooms vary in their facilities but are charged at same rate. Management listened well to our concerns. Staff were very helpful. Location reasonably safe with sensible caution.