For those of you who purchased a Mature Metal cage, would you mind sharing your overall experience?
What would you have done differently? What kind of adjustments did you need to make, if any?
Hands down, in my experience, #1. By a far distance. My situation is more experimental than every day and longer duration (though working towards that) so I can't comment on long term wear.
In that exploration journey I've tried over the years:
CB-6000 - first cage (5 years ago), and an old friend. Fits well, comfortable, good for at least a few days at a time (longest I've tried). Great quality, pain in the ass to put on, pinches periodically, but the comfort made those things tolerable at the time. This was a perfect cage for sizing the MM.
Chinese knock-offs - not going to bother, I've tried a few and they are all garbage. I can't imagine presenting one to someone, can't imagine actually wearing one for more than a couple hours, hear the horror stories about rusting, metal burrs, etc, yeah, the ones I've had are all crap.
HolyTrainer (v5) - recent buy. I want to love it. It fits incredibly well, the lock mechanism is great (no padlock dangling) and seems secure. It is a bit bulky, but is really comfortable at firs.t But then, all the material makes it pinch too much. Could be a sizing issues, I don't know...it didn't matter because....
MM Jail Bird - recent buy - !@#%ing nirvana! This is it (in my search so far). This I will present to my wife as something to try. Great build quality, good materials, looks great, feels awesome! Zero issues. I used the dialed in CB-6000 measurements for sizing and it fits like a glove. I wouldn't be surprised if it needs adjustment should I ever get to regular long-term use, but that should be easy to take care of with their customer service.
I'm sure King or others can better speak to interactions with MM, long term usage, and the finer points. But in my experience of the products listed above, this is by far the winner. It is in an entire different league.
That said, I am curious about the Watchful Mistress as proving a little better 'cover'. The Jail Bird is quite open, but that is still surprisingly restrictive and un-touchable. Great for cleaning, no tricks needed to put it on, etc. I enjoy metal far more to plastic, though the CB-6000 and HT provide a really cozy, snug enclosure that I really enjoy.
The security screw (if it is long-term fairly tamper-proof) is a massive step up from a lock as well. Much less bulk and stuff flopping around. Feels solid and professional.