I've only use the EcoSmart RTU. It's ok, but not as good as Pinnacle, Ultima, or Blackfire WW products. It requires a lot of buffing and can get hazy on darker colored cars.
I want to gently wipe dirt off, not have to buff it off. Its also nowhere near as cost effective as the others.
I've only used regular ONR, but like Pinnacle, Blackfire, and Ultima better.