Rivak is so knowledgeable and great to work with that I HIGHLY recommend him. He can work with clients at every level, but let me give you my profile since that is what I can speak to directly.
-I am a professional who works many, many hours, so efficiency is super important to me. Rivak comes to lead my workouts in my modest home gym, so I can get my workout in in less time than I was taking to commute to and from the gym, and pricing is very reasonable.
-I am 53 and, while I have always been active, I've lost ground in the last few years between hitting 50 and working too much (including relocating to a rural part of New England (and back again to AZ, yay!)). Rivak is great at pushing me enough to get back to where I want to be, and hopefully past that.
-I have a few injuries and arthritis issues to work around, plus challenges from sitting at my desk too much and letting my busy schedule impact my eating habits, and I totally trust that Rivak is knowledgeable enough to help me take control of those challenges while I helping me get stronger and NOT injure me further as less experienced "trainers" have done.
-I am pretty highly motivated, so Rivak is a great fit for me on that front. His level of fitness, nutrition, and time management are impressive!
-He has great life experience that makes him a pleasure to talk with (when I can catch my breath!) during workouts.
I hope that helps you if you are making a personal trainer decision! Go for it--you have only one life, make it a fit one, a longer one!