First of all: yes, this is quite a bit more expensive than if you'd just buy
the SD if it had just released officially by Valve. Buuut who knows when they're
going to release it over here? I know I didn't wait. If I (and you) can get
one now even if it's got a bit of a markup it's all good as long as it was
worth it.
For people that aren't quite experienced with computers in general like all
the ones that use Windows, this may not be the best thing for you. Linux is
quite a bit different to Windows and can be quite a bit confusing if you don't
know what you're doing. HOWEVER, at the same time, SteamOS is actually fairly
similar to Windows in some aspects so if you're good with Windows, you'll fit
right in with SteamOS. In the end, even if you don't have a lot of experience
with this stuff, there are plenty of tutorials you can search up that'll help
you out a lot in the end so make what you will of it. Besides, most of the time
it's fun to learn something new.
I reckon the 512GB model is perfect for us that want the most storage. Means
you don't have to uninstall games to fit more in like you would with the 256GB
and especially 64GB models as often, let alone upgrading the storage. Which if
you're not exactly comfortable with opening up devices to upgrade them like
myself, makes the 512GB model pretty nice.
Other than that this model of SD is no different from the other models in
terms of performance. Despite it's size, it's quite light. It's easy to use,
navigate and do whatever you'd like. Lots of things to tinker with (provided you
know what to do and look for) if you're into that stuff. The matte screen is a
nice thing to have too. The control layout was somewhat awkward for me at first
but I grew into it really fast. Lastly, that Samsung charger that MA bundles
together with the SD? Works perfectly. If you don't have an adapter for the
original SD charger the other one MA gives in for free should do just
as well.