The original 7100 Dish players where ok when we all figured out how to upgrade the hard drives, and you had to forget about using webtv, or the built in games
The 721 was a very good receiver, along with the 4000.
Here is what was pure garbage...
#1 model 811. I had so many issues with these when they came out I smashed one with a hammer, and for spite did an RMA and made Dish replace it under warranty.
#2 model 921. It was big, bulky and had too many bugs.
#3 model 922. Too clunky to operate, and buggy
You would think the model 1000 would be on the list, but they actually worked good.
Some of the best receivers (for their time) model 5000, model 6000, model 942, model 721k, model 211k, model 508, model 721.