I've owned the X for a couple of weeks, and just like all the reviews say (shocking I know) all the small improvements have made a massive difference to how great it is to own and play games on the X.
Even with the same chipset, the X runs games faster, smoother and cooler, therefore quieter than the original.
Probably not mentioned much is the sound of the fans when they are running faster, they now have a pitch that is no where near as intrusive when your gaming at higher Watts. It's hard to describe but if you're sat on the sofa running a demanding game, you don't bother other people in the same room due to the fans spinning faster. Something I was conscious of with the original.
The thumbsticks now feel a lot more precise with a weighty feel to them, which are great to use. And after having issues with the originals stick drift/accuracy, these are now very accurate to play with.
The left and right shoulder buttons took a while to get used to, as they feel like they have changed size somehow, but they both click with a positive feel. And the rear buttons are just fine, though I didn't have issue with the originals back buttons.
I don't feel any noticeable difference to the XYAB buttons, they just feel like the old ones. Which is perfectly fine.
The D pad, is a different story. That feels great now, with a quality 'heavy' feel to it that when you press, it clicks nice and solid without feeling or sounding 'clicky' and rotating it round with your thumb feels very positive and nice to use. A big improvement, the best I've come across in a controller.
And of course there's the 80Wh battery... What a massive game changing quality of life upgrade this is.. Playing high Watt AAA games for a couple of hours is amazing, this is proper portable handheld gaming as it should be, my Anker 140W power bank barely gets a look in now, and I don't miss being tethered to it by usb
The Ally X will do 100W fast charging, although my tests showed 78W but that's fast enough for me, to be topped back up without waiting ages.
Overall build quality feels excellent to me, it's a very sturdy solid device although as mentioned above it's not perfect. It's not quite Apple level yet
The RH trigger on mine did start to quietly squeak when I was playing some trigger bashing game, so after a quick Google, I opened her up, and dabbed a small amount of silicone grease on both trigger springs..easy fix
Upgrading to a larger SSD, was super easy apart from trying to pry the two halves of the X away from each other, the pesky clips are really quite secure, and it took a bit of patience to not risk breaking anything.
This is a fantastic handheld, not cheap, but Black Friday/Monday. ..Tuesday or whatever it is nowadays isn't far away, so there might be some offers on, because it does need to come down in price, then it will sell like hot cakes. Although I have checked a few times and it has been out of stock several times at the purple place, so it must be selling well.
Mick