If they had 10-star ratings, then I'd give Andrei 9 out of 10, so consider the 4 star rating to be 4.5 stars (you can't give 1/2 stars).
Pros working with Andrei:
-Andrei is easy to work with
-Andrei is open to design changes
-Andrei can take a concept and turn it into a pleasing design
-Andrei has obvious talent
The only way that I could see an improved experience (meaning 10 out of 10) would be if there was more direct, back-and-forth communication between me and Andrei. I think he resides in Europe, so we are at least 5 hours apart in time zones.
Overall, working with Andrei Bat was a positive experience. He was able to take a general concept and refine it into a finished product that is clean, refined, and still powerful. I look forward to possibility of working with him again. I highly recommend working with Andrei Bat.