I've been using these Chinese vacuum cups for about three months now and I like them a lot. They seem to really help loosen up the trigger points and muscle adhesions. My movement has improved quite a bit.
What works well for me is, putting the cup, or cups on, and then moving around. It's kind of an active release type of thing. It's working well for me. I've also seen cupping referred to as, "Myofascial decompression."
The only downside I see to these is, the purple marks they leave on your skin, but they go away in a few days so it's no big deal.
This is the set I bought. So far, it's holding up well. Oops. I meant to put this in the trigger point sticky.