Robot Cleaner Which one for Gunite Pebble finish Pool

[mnittler]

What is your experience and/or recommendations for a Robot Cleaner that would work for a Gunite Pebble finish pool?
I have been looking at the Dolphin Supreme/Dynamic Plus 5/DX5 Plus, Water Tech Blue Diamond RC, or the Polaris 9400.
For some reason the Dolphin is carried by various model names at different sellers but they look like similar units if not exactly the same units.
Which robots have you used? Would you purchase the same one again or change to something else?

 

[JasonLion]

I have a Dolphin Dynamic, and love it. However, the Blue Diamond is the one that has the best reviews from forum members.

Keep in mind that all robotic cleaners have problems occasionally. No matter what brand you look at you will find some people who like it and some who have lots of problems.

 

[woodsage]

I'm using the Aquabot Turbo T-Jet; had it for 5 years, use it once a month every month, hasn't missed a beat, very pleased.