I've installed 4 of these so far during our house renovation. I originally wanted to replace the dumb switch with something modern and came across these during Prime day.Packaging is excellent, so were the instructions. It came with a pair of batteries and fixings as well which was VERY handy. It does require a hub to work, unlike some other Tapo products that only rely on wifi. I already had a Tapo H100 hub so didn't need a new one. Quality is generally ok, albeit a bit platicky. One of the switches had a bit more travel than the other, I had to put some foam tape on the button to correct it.Installation is split into two parts: pairing and wiring. I'm a DIY enthusiast, not an electrician so before I got to wiring I did a lot of googling and most importanly, took a few pictures of wiring behing the existing switch.Pairing was a breeze, there is a latch under the switch, once moved to "open" position the front plate comes off revealing the battery slots and the "reset/pair" button. I put the batteries in, opened up the Tapo app, choose the switch I wanted to add and there on the app showed step by step guide to completion. It took no time to connect it to Tapo hub.The wiring part was also much easier than I thought. It doesn't require a neutral, which means it draws power from the included batteries instead. I made sure the main switch was off and used a mains tester to make sure it really was off! I then turned it back on to use the mains tester to confirm the live wire, turned electric back off to take wires out of the old switch and put the Live one in the LIN slot and the load one in the Lout1 slot. I did need go buy some spacers as the backbox turned out to be too shallow. You can see it in the picture.Once all that was done, I turned electric back on, pressed the switch and to my surprise it worked! Compared to other wifi smart devices, these switches seem to work much faster via the app. I suspect it's because the hub is making communication much easier and straight forward. Pressing the switch, the lights come on immediately without delay just like a normal switch.The switch makes an audible click/clunk noise when you turn it on, as if it's physically turning the switch on. Which is a good thing because one of my bug bears with smart bulbs is that they don't work when there's no internet. These switches however work fine without internet, as long as there are batteries, you can physically press the switch to turn lights on.Overall, very happy with the switches. I've mainly used them where there are multiple lights involved, dining lights kitchen lights etc. Much more practical and reliable then using loads of smart bulbs. There are some cons though.1. No status light, I understand it's not drawing power from mains but in this day and age, they could have used a very faint led as a status light. Would have looked nice, would come in handy in the dark as well.2. Altough the switch looks like you can click the entire face, only the bottom half is clickable. Very much like my old macbook!3. There are no 2 way wiring option. For kitchen and dining it was ok but for the hallway 2 way switch was a must for me. The only way I could do it is by grouping two switches and automation in the Tapo app so that one switch turns the other on and vice versa. (see app screenshot and video. Excuse the mess). If you're a competent electric DIYer, I don't you don't need to wire in the second switch at all. Just connect the wires with some wago and the second switch should just work. Although it works, they drawback is that it takes a second for the lights to come on as one switch has to ask the other to turn on as well.Would I buy them again? Not at full price. I'd like a status light and the option to wire in Neutral and get rid of the batteries.