I have to agree with others - poor quality, poor service.
I have to agree with others. Cheap for a reason. I bought the light duty arms to begin with as the gates aren't too big and/or heavy. At first, everything was ok then one arm stopped moving. Topens sent a replacement and I went through the rigmarole of changing it. Then it did it again. And again. This time the other arm. Topens suggested sending back and upgrading to the medium duty, which I did. These have a limit switch you need to adjust, unlike the first set which used pressure. The limit switch should be better, and more reliable. Should. Unfortunately not. I came home today to random half opening, closing too far, reopening because it tripped the sensors etc. I took the faulty arm off and could hear something loose. I opened it up and the magnet for the limit switches fell out. In 7 pieces! How the hell that happened is anyone's guess however, it looks to all intents and purposes that the limit switch(es) have failed (nothing happens with a meter when brought to a magent) and the screw rammed to the end, fracturing the magnet. Great. I am bought into their ecosystem with a lock (ah but not the Topens one - that badger failed after less than 6 months) and external keypad so a complete replacement would be problematic and expensive. I managed to rebuild the magnet in a fashion and have ordered a new set of limit switches, as well as a new set of openers because I can't be without them. Do not buy from this company. Once the warranty is up they literally do not care and will not help and they are basically junk that do not have a very long life. Communications is via email (and everyone seems to speak to Zak) which means a 24-36 hour delay between replies.