I haven't bought one yet, but played with them a few times at best buy and Apple store. I had a SP3 and SP4, didn't like windows, the loud fans in them, and they would heat up using drawing programs like Artrage (even just the trial of the app, which would crash) within minutes of drawing on them. To the point of uncomfortable to hold. So returned them both. Very disappointed in them, after reading such great reviews on them. I think I just needed them to be a tablet and not much more for drawing and the extra stuff, didn't meet my needs.
Now I'm a total android guy. I tried the Ipad 2, Mini, and finally one last time with the Ipad 4. Always returned them, because even with a bt stylus which lagged horribly, didn't work like my original Samsung Note 10.1 for drawing. And you can Forget drawing with the rubber tipped stylii.
Now with the Apple Pencil, really, besides the surface pro, there's nothing out there for artists. Samsung hasn't come out with any new Note tablets and seems like they abandon the older ones anyways. Surface Pro was a fail to me. So this is all that's left. Unless I get a wacom for around the same price, but am tethered to my Mac. So this is the only Portable Tablet available to artists right now, that's new technology. Samsung Note Pro 12.2, is two years old already, so not looking at that.
My biggest concern is that the High Price is not worth what it can do, but after playing with them and seeing what the AP can do, I think and hope it's all going to be worth it. Always heard Procreate was a great drawing app. Just hope a lot of other good art apps out there as well. It may be a niche market, but I'm part of that Niche Market and maybe it'll catch on like the Note series did with phones and the Tablets. Hoping Apple doesn't abandon it though, like Samsung. That's another concern. Otherwise can't wait to get it next week and start working with it. Also want to try the Astropad app to see how it looks with my artwork on my bigger 27" Mac screen. Seems like lots of possibilities.