Like all progressive presses, they can be a bit fiddly to get set up and get familiar with. I use mine for all of my handgun cartridge reloading, and other than self-induced issues have never had a problem. It takes me maybe 2 minutes to change from one cartridge to another since I have shell plates, carriers, and turrets set up for all of the cartridges I load for. I've loaded 10s of thousands of rounds on mine, and it is still going strong.
That said, progressive presses aren't for everyone - you do need at least a bit of mechanical aptitude and willingness to learn and understand how the press operates more than you do with a single stage press like the Rock Chucker. You are also limited in what rifle calibers it can handle - I personally use my Rock Chucker for my rifle cartridges so I can't give you much about that aspect.
$70 sounds like a good deal if everything is in good working order and hasn't been abused. If you have any other questions, be sure to ask - there are a few Pro 1000 users here that can help.
Be aware that there are a lot of anti-Lee posters here too, so you'll get to hear some bad about Lee. In some cases, I wonder if they've actually owned and used the equipment they comment on since my experiences are so different than theirs. I personally own equipment from just about every current manufacturer out there, and have had good experiences with all of them, Lee included. I've also been less than satisfied with some of the equipment I've had from several manufacturers, and Lee is no exception. But I don't run down a company just because of a single problem or negative experience. Do your research and make up your own mind. Lee is a good economical choice for many reloaders, myself included.
Just a Shooter