I have been on the forums for about 3 years and both Alverez and Aceves have positive reputations. The more contentious threads have mostly been about Dr Almanza, NOT Dr Alvarez.
I had a great experience with Dr Aceves and continue to be happy with the communication from his practice with me and my physician, when this has been necessary. Details of my surgical experience are posted on my blog, or pm me if you have any questions.
Margo - Burnaby, British Columbia HW 283 / SW 269 / GW 160 (I'm 5'8")
Check out my blog at http://www.vsggoodlife.com/