I just got the non-plus on Amazon, it was delivered on Friday. I'm not sure what the normal price was, but it was being advertised as a limited time price of like $328. Well worth it. I don't want another thing to charge, and my pool gets full sun. Yesterday was overcast, but it seemed to be running most of the day. It would park for a little while to presumably charge. Out of the box, I doubt it had a full charge. Today is sunny, and it's been running all day. As others have said, I don't care if it's not running 24/7, even if it just runs during majority of the day, the fact that I don't have to muck with it helps. Fortunately, my pool doesn't get much leaves since it's mostly above trees, it's the little pollen and bugs we get this time of year that I'm looking for. In one day, it must've eaten 1,000 bugs. They're so small that it hardly needs to be emptied. I can probably go a full week and not touch this thing. So far it hasn't gotten stuck, and it also completely covers my splash pad area.
I'm really in love of this thing. I hope it holds up to the brutal Texas summer/sun.
Amazon shows a matrix that shows the Plus having the adapter charging and "shallow water bumper". My non-plus came with additional bumpers which per the manual were to be used if you wanted to increase the bumper height. My bumpers are as short as can be and as stated, it can get into my splash pad area without issue, so there's no need for me to have the Plus. Finally, I liked the pure white of the non-plus better than the grey.
At time of shopping, the Plus was $70 more (technically $100, but Amazon had a $30 instant coupon).