I had an ROG Ally which I just returned. Currently waiting on the Legion Go now and see how the reviews are.
There were a few reasons why I picked the Ally over the Deck such as the screen and power but the main thing really was windows for GamePass. I already use it with my Xbox so just being able to natively play so many games was a value I couldn’t beat. Cross saves also work well so I could play something at home and then take the Ally with me on the go seamlessly. I think the Deck is great but personal factors made the Ally a no brainer.
My biggest complaint with Windows is how there’s no Big picture mode for the Xbox app. Steam on windows does better than Microsoft on its own platform. I hope there’s a fox for it at some point. Sleep is also really annoying but wasn’t that big of a deal breaker. Otherwise windows hasn’t been so bad. I’ve been enjoying using it as a desktop as well coding or watching Netflix etc. I know that goes against the grain in this community but there is definitely a place for Windows handhelds in the market. Now let’s hope Microsoft sees that and makes some changes so it works as flawlessly (at least 90% cmon) as the Deck does.