I have a home office with a tile floor and relatively bare walls, and the sound reflections were noticeable, particularly when recording any audio, so I wanted something to reduce sound reflections.
The fabric covered version of these panels worked and looked great on my walls, but I used these paintable panels to hang from the ceiling. I first painted them the same color as my office and ceiling (a very light tan / off white). I would definitely recommend following the instructions for painting this panel (see the video for instructions) and using a full width, thick nap roller. I initially tried using a small foam roller, but that produced lines where slightly more primer and paint was applied at the edges of the small roller. I repainted the panels with a full size thick nap roller, and the results were much better. Don't skimp on the roller and you'll get great results.
The panels come with mounting clips to mount them on walls, but there are no instructions or hardware for ceiling mounting. The panels aren't particularly heavy, so ceiling mounting hardware doesn't have to be very heavy duty, but I didn't want them falling on my head if one came loose. After thinking about possible options for ceiling mounting, I came up with the idea of attaching some 1/4" plywood to the back of the panels using construction adhesive. I then purchased some metal eyes, metal hooks, and small chain from Home Depot. I pre-drilled and screwed the eyes into the panels, and I pre-drilled and screwed the hooks into the studs in my ceiling. The small length of chain allows the panels to hang down from the ceiling, making them easy to install, and theoretically providing a little more sound absorption.
See my photos on how I attached the hardware and hung them from the ceiling.
Hanging the first panel from the ceiling by myself was far more tedious than I thought, but after I figured out a technique, the other panels were easy to hang. I think the painted panels look great, and the color match with the ceiling makes them more discreet than a colored fabric panel.
With these panels on my ceiling and several others on the walls, my office sounds dramatically different. The mid and high frequency reflections are virtually gone now, and when I walk out of my office, the sound reflections I never noticed before are now very obvious. I can now record audio in my office with a dynamic microphone and it sounds great. Phone calls and Skype calls are also much better, as my office is quieter overall.
These panels are not designed to prevent external sound from entering a room (they are not "sound proofing"), but they do a fantastic job reducing sound reflections.
One warning: When you unpack the panels, they have a very strong odor. Because I had 10 panels, the odor was so strong that I had to set them all outside for a week. After a week, the smell had reduced to the point where I could bring them inside. After sitting another week indoors, the odor was no longer detectable.
High Quality of Material, Light Weight, works well