1 UTV and 3 Dtivo's all run perfect!
I added a 2nd hard drive to my Dtivo and only 2 times have I had problems in 8 months. One time it kept rebooting, pulled the power and it rebooted again, did this for a day. That was 4 months ago and has never done it again. Other problem I had happen one time is I had my Surround sound receiver on over night (Tivo sits on top) it got up to 75c in the Tivo and it froze up. Unplugged it and it was fine after that.
No missed recording on any of them... you just can't go wrong. I would only switch back to Dish if they got a Tivo or a UTV...other than that I'm gone for good.