I have the Alien and the Hexus (not sure if either are the ‘II’ variants).
Both work well for what I’ve used them for but neither is perfect; the Alien is an awkward shape (I personally think the same of all wide-bodied tools like the Multi-17) while the Hexus, which is *almost* fantastic, has a howling design flaw in that the 8mm adapter lives on the 5mm key and is capped rather than open-ended, which means 9 times out of 10 you have to take the damn thing off before using the tool and put it back on again afterwards, making sure you don’t drop it in a ditch in the meantime. I’ve fortunately had no need to use either of the chain tools.
My favourite to use is the X-Tool, which is nice and simple and fits in the hand perfectly, but it doesn’t have a chain tool or a Torx driver so it won’t cover everything.