with the doors open at bonfires or just outside in general smoke and bugs always get in the truck with the doors open or windows down. Not sure what will happen to slower systems. You have to monitor your body temp as you could overheat in it. I can see this as a potential factor for people complaining about lack of bass. Fit a little tighter than my old slippers which were very similar, but it just feels different and, in general, I think they are going to work very well. Protects my beats from wear and tear My feet do not shift forward with these. In addition, it came with both heel cushion and toe cushions to place into the shoe. Also I like that Anker have come up with an original design and colour which is very dark matt grey as opposed to a lot of other models on Amazon that all look the same cheap glossy black. Caveats: I have only owned the shoes for a couple weeks, and I havent had yet had a chance to test them on wet or icy terrains.