I got sick of waiting for Valve to release it in Australia (and I didn't want to go through the hassle of VPN + mail forwarding to get a US model), so I bought one of the Chinese competitors instead — the Ayaneo Air.
It's also fantastic, with a couple of caveats — lightweight, beautiful (albeit a little smaller than ideal) screen, superb for emulation, remote play, and any PC games that work well with a controller, but it runs Windows by default (and it's a horrible OS for a gaming handheld, with bad battery life and performance penalties) and the various Linux flavours that work with it (including SteamOS) are burdened by the same Windows-games-sometimes-don't-work problems you mentioned as well as an always-on and very bright thumbstick LED that doesn't yet have any Linux driver support.