Heading into our 2nd season as in-ground fiberglass pool owners and we’re ready to invest in a robotic cleaner. My husband suggested getting the Dolphin Nautilus CC Plus which he found online for $829 (w/ the caddy), but he didn’t do much research...lo & behold, I just discovered there are about a bazillion Dolphin models. I am willing to invest in something higher end if it really gets the job done better, but I also don’t want to throw money away on features we don’t even need. Is there a Cliffs Notes on these things?? Help!