The brushes just have really soft bristles, at least one of them should have been heavy-duty. The job should take around 10 minutes for someone who knows their way around simple tools such as a drill, screws, wall plugs/anchors, etc. I quickly put these on when I hear the jets looming. These are pretty comfortable and I found that I could wear them for quite a long time without feeling like I need to take these off and I appreciate the understated design thats quite professional looking: its a nice change of pact from the typical "extreme" look that budget gaming gear tends to go for. Nothing bad about it. 3 Different bud sizes make them a comfortable fit, stays in pretty well, cancels about 70% of ambient noise, and the sound quality is decent and does bass really well. It makes it easier because the metal pieces slid around A LOT when I first attempted to put it together. There was a little bit of excess plastic on a couple of corners, but they came off very easily with just a pull. Only thing I don?t like is that the AirPods stay connected the entire time to your phone and it does drain the battery life on them. It feels good, soft and comfortable friction.