My ipad 1 is getting nearly useless now. Most apps require a much newer version of iOS to install, so you are very limited by that right off the bat. For the ones that have an older version to download, they crash alot. I find surfing the web with it to be excruciating because it constantly crashes.
What it DOES still do well:
Netflix still runs like a champ
Locally loaded videos / movies works great
A few games still work ok like Angry Birds and Candy Crush
GPS signal still works great (thinking about repurposing as a dedicated, bad-ass, 10 inch GPS device in car)
Now here's what I don't understand, so may apps and browsing the internet do not work hardly at all, but Infinity Blade, a complex 3D game that was trend setting in its day for technological advancement, works absolutely perfectly. How can that be? Surfing Yahoo crashes the device left and right, but a 3D FPS game runs perfectly with wonderful graphics. Go figure!