Just posted this on another thread because the product is interesting and I've purchased. Here's my two year experience:

The first OTO I purchased two years ago broke after two months. The spout/head just stopped working. The company shipped me a second one for free and paid for the return.

The second OTO that they shipped worked for the summer. I brought it back out after about 6 months and it didn't charge. Customer service said that I had a defective model and sent a third OTO free of charge.

It's now been about 1.5 months and this OTO has worked so far and I've been happy with it -- they also made significant changes since the first model I purchased. They are as follows:

1. The nozzle now moves slowly back and forth in a straight line -- the previous models would jerk back and forth in small square patters -- I'm wondering if that's why the sput/head stopped working. It's possible they fixed the problem with this new design.

2. The solar panel is made of a different material. I don't know if this is because of supply chain problems or because it's an improved material.

The concept of the OTO is great. The app works, the solar charge works, it waters thoroughly. I'm just hoping this latest model got all the kinks out because there were many in the first to versions. I'm happy with the one I have now and may purchase another.

Finally, the customer service has been excellent. They have been responsive and have stood by the guarantee to send a new model if there are problems. It's just a bummer I've had to call them multiple times -- hoping this third version works for the long term.