I have the 1200 DPS. I had one problem with it in a year. That was solved by turning it off, unplugging it and turning it back on.
I've read alot of stuff about people saying they are too sensitive to air currents, fluorescent lights, etc. but this is usually not by people who own one. The manual has cautions about not using them near fluorescent lights, or air ducts but my understanding is that all like products have the same cautions. I have a fluorescent lamp above my bench and it has never bothered it. Likewise, I have an air conditioning/heating duct about ten feet behind my bench. One thing that the manual does caution about that may be a real problem is that they say that most reloading benches are not heavy enough to use a press and the dispenser on at the same time. I've never had the need to do this since I drop all my charges and then seat them. If you want to do this you could always put it on a separate small table.
The biggest compaint I have is that it beeps too loudly when you either enter a charge or it finishes dropping a charge. I consider this a safety feature however because you know for certain when the charge is finished being weighed. You could go by the count number it displays but this is only displayed briefly.
Some people don't like how long it takes to drop a charge since it weighs each one. This can supposedly be sped up by dumping the majority of each charge into the pan and letting the unit measure the rest. I've never felt the need to do this however. By the time I move the funnel to the next case and check to see that the powder is not bridged the next charge has just about been dropped.
Another thing people complain about is the warm up time of 30 minutes. Again, I have heard that this is the same for like units of different manufacture. If you want, the manual tells you how you can short circuit this but I wouldn't.