Better? Yes. Perfect? No.

I had one of the first models and they were not good.

Now, I have the i7 and it is great at dodging items I leave out (shoes, random boxes, cat toys), but it obviously performs better when the floor is free of obstruction. I do not replace the bag as recommended and disabled the setting that prevents the tower thing from becoming overfilled. There are probably cheaper options around, but the official roomba works great these days. I have it do a deep clean (every room once and the heavy traction areas twice) on Monday and Thursday and then a quick clean every day. I haven't had to spot clean since I got the schedule started, but I do occasionally randomly run a schedule if I have guests over. I even have a very long step it can fall off of but it hasn't even fallen off once... well not completely true, it's wheel has got stuck off the cliff a few times.

Tldr; it's great. Much better than before. Get one.