It works great. No problem with wearing glasses. It even worked when I had those big plastic face shields on. Only if the shield was really fogged up would face id not work.

You could magsafe charge as long as the back of your phone and your magsafe charger are dry. The port is not used for wireless charging.

Steam from being in the bathroom during a shower is quite harmful though, as the warm steam can over time weaken the seals in your phone. The same thing happens if it is submerged in water too much as well. Having your phone in a damp pocket would be no problem though, just as using it in the rain is ok too.