I FINALLY decided to purchase another robot (my last one didn't even make it 2 seasons). I called Marina Pool and they recommended the Explorer 30 (it was among the only ones left). This model is best described as a gutless wonder. I opened the box and it had a lemon smell--odd...seems like it was "cleaned". I dropped it in the water and loosely left some cord on the deck. The robot is unable to pull its own cord off the deck. It shuts off randomly--sometimes 4 minutes--sometimes 30 minutes. The power pack thing stays on--but the machine is off. It goes up the wall maybe once, and it won't even attempt the step--not even a little. I've cleaned it--flipped it over and checked the track--it's fine. It's plugged directly into a GFI (not an extension cord). I'm guessing it's defective? I've called and emailed Marina, they haven't responded (I just sent another message). Anyway, I'm guessing it's just defective but wanted to know if anyone else has this model and how theirs works. I'm debating about just going back to the suction vac and I'm getting tired of expensive robot drama. My last one seemed to do much better at cleaning (though not making 2 seasons caused me to hold off on a new one for the past 2 years). So I feel like I sort of know what they are capable of--this new one certainly seems not right.