I recently acquired a like new 800+ with the auto drive and a foot switch. I set up the press without the drive connected to start out just to get a feel for the press and then connected the auto drive and love it. It is quiet and can load as fast as I can feed it hulls and wads. While speed is not my goal, it could outpace me feeding it if I were to keep the throttle down. The ability to flip a switch and reverse the press in the middle of an operation is very nice for those times when you realize you didn't get a wad in the wad guide quite right or whatever.
I've loaded on MEC's, Hornady 366, and RCBS the Grand. I got rid of the MEC, the 366 and had settled on the RCBS because it won't drop shot or powder if there is not a hull in position under the drop tube. Unfortunately, RCBS does not offer any drive unit for their press so you have to pull the lever. I found my PW 800+ with the auto drive for a price I couldn't walk away from so I brought it home. It took me a while to get used to it and I've had my share of spilled shot and powder or had times where I forgot to turn the shot or powder back on after having them off but once I got used to the press I love the shells it turns out. Reloading Remington STS and Nitro's and the crimps look like factory. And the auto drive takes all the effort out of the process.
Now if I could just get PW to devise hull activated shot and powder gates it would be great!