I booked a large group, we had 5 condos. The condos were wonderful, clean, nicely decorated. The proximity to the Canyon Lodge is a plus. The kitchen was well stocked with plenty of appliances, pots, pans, dishes, etc. There was plenty of firewood. The beds were comfortable. The jacuzzis were hot and everyone enjoyed them. Very nice.
There are no elevators, so if you have a condo on the third floor, be prepared for some huffing and puffing. With food and ski gear, it is a workout!
If you plan on booking here, especially with a group: BEWARE of parking issues; They tell you, three parking spots per unit. If you have more than 3 cars coming, you may end up having one park near the entrance to town in the RV park. (at $10 per night and sevderal miles away) This results in a logistical nightmare. It is illegal to park in parking lots or on the streets during snow season.(it doesn't say this part on the web site)
Whatever you do, don't deal with the girl at the front desk, by phone or otherwise if you have problems. The only word in her vocabulary is "NO!" She is not able to say, "Let's see what we can do to solve your problem, maybe we can work this out, etc. (actually, we encountered two unfriendly women at the desk) The answer is always "NO.", "Not possible", "Those are the rules." (period). I had to ask to see the manager, who was just the opposite, and solved our problem immediately. I would have given this place a zero for customer service if I had not taken the initiative to talk to the manger. .
The manager, on the other hand was very helpful with our parking issues and was quick to give us overflow parking. It was no big deal to him, however it was an impossible task when dealing with the front office help. ?
The entrances to the different buildings, which are stretched all along the street are not marked and it is difficult to find your unit the first time you arrive, especially if you arrive after hours. They do provide a map on the website, and it is HIGHLY recommended you print and take it with you if you arrive at night.
The buildings are spread out, so if you have a group, and multiple condos, your group is likely to be scattered up and down the street.

I have stayed at this Condo a handfull of times. We try and visit at least once during the summer for mountainbiking and hiking and a few times during the winter months for skiing and snowboarding. This condo is located just a short walk up to Canyon Lodge (Chair 16) and really couldny be in a better location. The parking is underground which keeps your vehical warm and safe. The condo itself is big and cozy and there is a lot of space to spread out and relax. . Its on the 2nd story so there are great views of the area around the condo. The Master bedroom is huge with a king bed and has its own bathroom and shower/tub. The second bedroom is nice and has a queen bed and a full bathroom right outside the door. the loft is also great because it has two twin beds and its own full bathroom upstairs. The kitchen is a good size with all the appliances you would need to cook, make coffee, and entertain your family and friends. There is also plenty of space to store your jackets coats, etc. You also have a full washer and dryer if you are planning on staying a while. The living room is nice too; there is a 40 inch LCD flat screen TV (so bring your xbox360 or playstation); and the real wood fireplace is such a warm touch in the winter; with plenty of wood stored conveniently on the patio. There is also high speed internet. If you are looking for a wonderfull place to stay during the winter or summer; I would defintely consider this Condo.

We went with a large group that rented several units. Our family shared a unit with another couple. The units are very comfortable, very clean and convenient. Well equipped kitchens. You must go upstairs from the underground parking, no elevator. We are going back again in 2009. Good, solid value. Lots to do: we hiked, kayaked, road and mountain biked, shopped and more.

A novel idea which we came to through Trip Advisor; stay in a condo instead of a hotel for the same price! We were late in arriving at Mammoth Lakes so reception kindly left us keys and instructions. The unit they allocated us (72) was amazing; much nicer than other condos we have stayed in before; two beds, two baths and a wonderful living / dining / cooking area with windows with views to three sides and balconies to two. The unit was extremely well equipped with every comfort; open fire with wood, TV + DVD, new kitchen with nice appliances etc. In addition the whole place was spotlessly clean and well-presented so that it felt as if you were a guest in somebody's home. In addition, free local, long-distance and international calls were an unusual and welcome boon! We spent a really great couple of days here; the town is quite lovely with a range of stores and things to do and if you tire of that, Mountainback has a pool and the usual amenities. The reception staff were really friendly and we didn't want to leave.

One note of caution though; if you plan to use Mountainback as a base for exploring Yosemite, as we did, be prepared to get up very early as the road to the park is very long and slow. I'd still stay here again though!