I think I'm about 16 hours in right now and I'm really enjoying it. It is very reminiscent of the Quest for Glory Series but also very different. The combat is different than any of those other games - turn based this time. I think the time constraints make things more interesting. It isn't possible to do everything in one playthrough.
I am not sure where people are seeing the slowness issues. They have patched it several times (I'm on steam so it's automatic) and they have another one coming up soon. One of the things they fixed is the speed of the main character walking and running so that makes it a lot easier.
I'd highly recommend it!
There is another thread on the game as well if you want to read with more review links etc. from when their kickstarter was going on: