Strengths: Cheap. Under £40. Seem very durable too. Mine have been submerged totally on wet and muddy runs and they come up fine with a hosing down. I've worn them off road, for long marathon training runs and interval training on a treadmill.
Weaknesses: Sizing is small so I went half a size up. Sorted. Grip is there for off road so cornering on smooth pavement isn't optimal. As you'd expect.
Overall: I'd definitely buy more pairs and save my money for lighter racing shoes for when I need them.
Strengths: Probably is a great product for recovery.
Weaknesses: I just can't get it down my throat...
Overall: I'd just have the normal Rego - chocolate is lovely.
If you can stomach it, then try, but if I were you - just get a sample sachet first. If anyone is interested i have a vanilla one hanging round somewhere. I really couldnt drink it even if my life depended on it.