I personally don't like them due to privacy issues. Almost every hotel I've ever been to noise travels and you can hear people in other rooms/hallways. Not necessarily constantly but there's also a big difference between normal conversation and many bdsm activities.
I've done some but, safety concerns aside, I find they only work for me for certain scenarios. Otherwise, the vibe of a hotel room is too uniform, sterile, lackluster, boring.
But, really, I no longer offer them because there have been far too many indications isn't just not safe. Between people reporting they've found cameras or microphones in their rooms or that hotels are keeping an eye on who's coming and going, or the horror stories that were being reported, I don't know, 6-8 years ago with a handful of different hotels showing evidence of trying to kidnap single women who checked in, I just really find it all beyond my acceptable level of risk.