I liked it. Demo lasts about 30-45 minutes, depending how much stuff you will do. People may rightfully have some issues with combat and animations as they're very clunky, I also had some minor issues with equipping weapons while playing on a controller. But overall I feel devs did a relatively good job at giving a small slice of the game and using it to showcase all of the basic mechanics while still remaining faithful to Gothic 1 experience (no handholding, general freedom in exploration, having to be very careful in combat, secrets if you stray from a main path) and giving a general feel of what they want to do with this remake
It worked decently on my few years old PC. The area is similar to what they had in that old playable teaser released a few years back (Exchange Zone and path towards Old Camp), but this time around its design is much more faithful to the original game. There are some little stuff hidden in every corner, like extra consumables, weapons and even missable side quests. They did added some areas here and there, but these feel more like an extension of the original designs over inserting completely new areas. And they also utilised these NPCs quite well, using them to deliver some basic tidbits about lore and the Colony
In general it's shaping up to be a very janky game, so it's worth to keep this in mind before playing