Me and my partner stayed here in January 2013, we stayed here two years ago too and simply fell in love with the place. The Rimrock I would say is one of the best places to stay, the other being Banff Springs. The rimrock's views are simply amazing but only if you book the right type of room grade, I noticed that some rooms overlooked the multi storey car park so just bare that in mind when booking.
Rooms are comfortable and the staff are generally very nice, our check in wasn't the warmest of check ins but concierge more than made up for it being very friendly.
I'm a keen swimmer and one factor that I loved about the hotel when we stayed two years ago was that it had a swimming pool, I used the pool a few times during the stay but had to stop as there was sand/grit in the large hot tub at the bottom (I'm not being picky- it seemed that someone had dumped a bucket of sand in it) and the swimming pool was seriously murky and made my skin itch like mad - funnily enough the hotel closed it shortly after for a few day's.
Generally I would advise you give the rimrock a go, they have some massive pluses such as the complimentary roam bus which gives you a lift into downtown Banff every forty minutes but be weary at weekends as the hotel is always full!