Every light in my house is Hue, and all rooms have those Hue dimmer switches mounted over the normal light switch.
I absolutely love it. It's never been anything other than instantly responsive, works without the internet and I can turn all the house's lights off from my bed. Additionally, the utility rooms, hallways and bathroom lights are just fully automated so you never think about it. The regular switches are still there if you need them, but in over a year since installing it, I've not touched any of the traditional light switches.
My only issue is that the Hue Bridge has a maximum limit for the number of lights and accessories you can run, which I'm starting to get close to. The lights are also expensive, especially the low voltage outdoor lighting, so for that I just use a standalone ZigBee dimmer switch which integrates with the Hue system.
There are a few options on the market depending on where you are. The specific product I have seems to be out of manufacture now but the replacement is the Samotech Hue Switch cover SM200 V2. It fits over the top of your existing light switch and the wireless dimmer attaches magnetically. If you need to turn off the light completely you can pop the cover and access the switch underneath.
It is a little bit bulky due to the nature of it but that's not something that bothers me. If you're particular about your interior design, you may need to look elsewhere: there are also complete light switch replacement products that are thinner and look a bit sleeker, but I haven't felt the need to move to those.
Another thing I like about the Hue system is I had so much difficulty finding reliable combinations of non-smart dimmer switch and LED light. Despite spending a lot of money to get supposedly high quality LED compatible dimmers, one would break every few months and occasionally they seemed to cause my LED lamps to burn out or have other weird issues like not completely turning off. All dimmer switches I tried had a subtle buzzing at certain light levels too.
It's possible there is some combination of lights and dimmers that works great, but since switching to Hue, it's the first time in my life where my lighting system has required zero maintenance in over a year. Other than when a squirrel bit through my garden string lights...
If you’re happy with your smart setup it’s trivial to remove the existing switch, connect the wires directly and put a cover on top, then attach the wireless switch to it using adhesive/Velcro.
I absolutely love it. It's never been anything other than instantly responsive, works without the internet and I can turn all the house's lights off from my bed. Additionally, the utility rooms, hallways and bathroom lights are just fully automated so you never think about it. The regular switches are still there if you need them, but in over a year since installing it, I've not touched any of the traditional light switches.
My only issue is that the Hue Bridge has a maximum limit for the number of lights and accessories you can run, which I'm starting to get close to. The lights are also expensive, especially the low voltage outdoor lighting, so for that I just use a standalone ZigBee dimmer switch which integrates with the Hue system.