Unsolicited thoughts about the Hue system as a whole for anyone on the fence: We use these in our house, which isn’t huge, but is big enough (3br, 1.5ba). We have the hub by the router in a less than ideal (from a router’s perspective) place because that’s how it worked out and it has no problem reaching any of the lights in the house.
If you sign in with the app, you can control your lights when you’re outside the range of your wifi. Helpful for when you enter the house with two armfuls of groceries (turn them on from the car before you load up); when you’re away from home; etc. Our outside light is one, too.
You can turn these on without the app if, say, you go into the room and realize you don’t have your phone. (They’re always “on,” so turn it off, then on again, and that will manually power it on.)
There are a bunch of lights that we’d rather just keep on a switch, but this is obviously a personal preference. But I bought a bridge with four bulbs and then another four (like this offer) and three of them are sitting in the box still. So they’re pricey, but it’s not like you have to replace all bulbs, and, in fact, it probably doesn’t make sense to.
The dimmer is basically a slider on your phone and has a very wide range. You can do a lot of other programming things, like set them up to dim at bedtime, timers, whatever, but I confess I mostly just use it for its remote capabilities, so can’t speak too much to these.