I very rarely ever did. And when I did I made sure I trusted the studio and knew enough. But even with this preparation I was burned most of the time preordering.
Nowadays I notice a game I like and I wait for 1-3 years, then pick it up DRM free, with all the extensions and fully patched for oftentimes 15€ or so.
It is great that the firmware is open source. However their customer support is utter shite. I have given up several times hoping for help on a keyboard bug.