This was my third time in Mt Princeton Hot Springs and I always love to come back. Even though I travelled a lot through the US since 2009 (Utah, Arizona, Nevada, California, ...), this is definitely my favorite spot.
Beautiful mountains, St Elmo, waterfalls, fairly close to Aspen via Independence Pass, Twin Lakes, ... plenty of attractions, e.g. horseback riding, white water rafting, biking, hiking, camping.
Resort itself is very nice, both cliffside rooms and cabins were very clean and in perfect shape every time I stopped by. Staff was very friendly and helpful, I never had any problems. Once the AC in our room stopped working, but it was immediately temporarily replaced with box fans and fixed the day after.
I would recommend this place to anyone who loves to enjoy Colorado from a relaxing and peaceful place.