This product definitely improves workout performance. I have been taking Blonyx HMB+Creatine for 2 years now and have noticed that my CrossFit workouts have gotten steadily better even though I just turned 60 years old. I often rank above fellow CrossFitters that are 20 years younger than me. I get body fat testing done several times a year and have maintained and improved skeletal muscle mass over this time period. I would highly recommend this product for men in their 50-60's for preventing that decline in muscle mass that comes with age.
I can't use whey protein and have found vegan protein to be gross tasting - this is a great option. It tastes good and I actually find it satiating, which I have rarely found for protein powders in the past.