Which cleaner to get???

Hey, it's good to be back, it tells me that I'll hopefully be swimming real soon.

I'm looking to get an automatic vacuum. I have a Jandy Ray-Vac, but it works on return pressure and because I have a cartridge filter set-up, I'd rather have something that runs independent of the filter system.

I have an IG, vinyl, 16x30. I like the reviews of the Robo Kleen, except it claims it's only for oval, AG pools. I see the Pool Hog is it's bigger cousin, but it says the recommended surface is concrete. Does this mean it would be bad for my vinyl pool?

Could I use the Robo Kleen?

Comments, suggestions...