Tl;dr I recommend you stay here and request a room on the second floor.
I really enjoyed my stay at Glur hostel. The pool area is beautiful and relaxing, and it's a great place to meet others. The atmosphere is laid back, yet still considerate. We had a great experience with the staff, who spoke a fair amount of English and were always happy to help us. The only reason I don't give it 5 stars is because of the quality of our room. We were originally in a room (private standard double) on the ground floor, where there were some bugs (not a lot, but enough to freak out someone with an irrational fear of insects) and a large stain on the comforter. I also found some dirt in the bed. The bathroom had a strange green light, giving it an ominous feel. The front door didn't extend all the way to the ground, leaving an entryway for bugs to crawl in. Thankfully, I didn't have to confirm that theory at night as we were moved to a room on the second floor (luxury private double) after some plumbing issues. This room was an upgrade: cleaner, bigger, better lighting. I give this room 5 stars for a hostel. Both rooms were beautifully decorated along with the rest of the hostel. Breakfast is flipping amazing and there's a spa on the property. I am currently staying at a fancy hotel in the western part of Chang mai and am missing glur.