I have one. If you need to go after a single or a few aiptasia or majano, it may be an OK tool. But if I had it to do over again, I wouldn't even pay half price for it! The handle is very long and it's very difficult to get after anemones that are under rock or coral ledges, or it deep rook holes, or are in tight spaces. And you need good access or you can't get the tip all the way to the base (foot) of the annemone and they just grow back. And it doesn't work well at all for going after bigger polyps. It would really annoy the mushroom or xenia I went after in a friends tank, but there was no way it would kill it.
Lasers have the exact same issues. I have 2 of those because I hoped a more powerful one would work better. It doesn't, so now it's an expensive toy!
I use Aiptasia-X on upright anemones and I use a real hypodermic needle with hydrogen peroxide on ones that I can't get the Aiptasia-X to settle on. I had a pretty serious infestation at one point and I ended up with a Double Saddleback Butterflyfish that ate all the aiptasia in a couple of weeks, then ate all the majano over a month. For the next 6 months it ate frozen food. Then one day it took a couple heads off a Frogspawn which I pulled from the tank. The next day it ate a head from my Hammer. So I pulled it and it's in a fish only system called my 125g sump along with a blue damsel and a cinnamon clown that are just too aggressive to be in with other fish.