Hello, I'm new to TFP, and I had a question about pool cleaners. We moved into a house with an existing pool that had some really old and undersized equipment. We replaced the entire setup with what is indicated in my signature, and the only missing piece right now is a robot cleaner. I'm tired of vacuuming every time the pool gets dirty, and am hoping to make a purchase in short order. I think we've narroved it down to the M500 as there is a lot of good feedback on this model. I didn't find a lot of info as to how this unit compares to some of the lower-end commercial models though ... like the Odyssey. Overall, they seems similar, but the Odyssey appears to have fewer features at a higher price tag. Is it just a more robust, well-built unit? Does anyone use one of these?