My friend and assistant has been using the Glidecam for 2 years. I have one myself and am still struggling to master it, mainly due to lack of time.
The Glidecam varies in price from around $350 to $550. You don’t need a support vest when using a DSLR, but it will get heavy…It’s a lot easier to balance than the Steadicam Merlin and of course cheaper. Cristina who along with Jon Connor run CanonFilmmakers.com have made an excellent tutorial on which one to buy, how to balance and basic movement. She is currently working on a follow video for more advance moves. I really recommend watching this video if you are thinking investing in a steadicam style device for your DSLR or even if you have one and are struggling with it.