I’ve owned it and lots of other drum pads. What I liked about it as an Ableton user is that iy has transports and session control, as well as four encoders, so it’s kind of an all-in-one for Ableton. And I loved the compact size of it. What made me return it though is the double triggering. I bought two different Atoms and both had the double triggering problem. Also, can’t change the notes on the pads, which isn’t a problem if you can MIDI learn like with Addictive Drums 2. Also, and this might be a minor quibble, you can’t change pad colors.
In the Atom price range is the Launchpad X, which I own as of a few days ago. 64 more sensitive pads and very customizable. However, the pads are a good bit smaller. Right now it’s $159.99 at Musicians Friend, etc.
There is the MPD 218. I haven’t tried it but I did buy an MPD232 and returned it because of double triggering. It was sensitive enough but not as sensitive as the Launchpad X.
You can often find the Maschine Mikro MK3 for $170-ish used here in the U.S. I had one. Loved the pad size and sensitivity. But it double triggered, so back it went.
You can find the PadKontrol for around $60 used online. Great pad size, great sensitivity - though a little less than the Launchpad and Maschines but still sensitive enough for me. Two map-able knobs and XY pad and an input for a pedal (like a hihat or kick) but the pedal input is not velocity sensitive. And no double triggering, on my unit at least.
So my recommendation is the PadKontrol (I have the silver one). I like the Launchpad X but the pads might be on the small side for some people. Oddly, I think the Launchpad X pads are slightly bigger than the Launchpad Pro MK3. I’ve owned the MK3 and remember the pads being a little smaller - I was hitting other pads accidentally and felt my fingers more bunched up than with the X but have not measured them to verify.
Right now I still have my Maschine MK3. I’m tempted to sell it and just keep the PadKontrol and maybe the Launchpad X. The Maschine MK3 checks all boxes for me: very sensitive, great pad size, no double triggering, has transports/encoders for Ableton that I use with the Ableton legacy script, has two screens, and works so well with the Maschine software of course. But they go for around $450 used, so I’m finding it hard to justify keeping it when I can use the PadKontrol and my Launch Control XL in combination with Ableton. Those two cost me about $150 used, versus the $450 I could get from selling my Maschine MK3. But it’s nice having an all-in-one with the Maschine MK3. I never use it and think something is missing. It pretty much has everything and is very customizable MIDI-wise if you don’t want to use the Maschine software.