When I have things printed from Thingiverse files I use MilkNasty Designs exclusively. I have found them to turn out high quality product and they get it to me quickly. Two thumbs way up!
Extremely pleased with the quality of these prints. Very clean and precise. I don't think any filler will be needed, ready to sand and paint out of the box.
Excellent in terms of communication and speed.
I gave 4 stars on quality since the 2 parts I ordered didn't fit each other. Still good for the price and shipping time.