I have been researching for great ceiling audio treatments, and it was hard to find something that really suited with my wishes.
I have a small studio in my room, around 4x5m, with ceilings that are not the highest (about 260 cm). These panels are just perfect. They're cheap, really easy to install/adjust in height and most importantly; they have a big effect on your room treatment.
They make an absolute audible difference. I'm really really impressed, especially for this price. Highly recommend these.