I must say I was excited about trying a robot. I have a polaris 380, and want to shoot it most days. They told me it's the one to buy(the m400).. I have to say, I'm quite disappointed. It misses the right corner of the shallow end every time I run it. Just a plain 18x36 rectangle pool. Nothing fancy. You'd think a 1400 dollar robot would clean the entire pool esp on a 3 hr cycle. Is this normal? I don't know what to do? It's not much better than the 380. Besides the power consumption..