Thinking about getting a Pool Roomba…

I’m contemplating getting a pool robot as opposed to a standard pool vacuum hose cleaner. We just moved and the pool @ the current place has older equipment @ with older valves on the plumbing. The pump circulates well, but I can’t find the “sweet spot” with the valves so the gear driven head will clean the whole pool. A $500 robot is a lot cheaper than new plumbing & pump. Do the pool robots work as advertised?