I tried the Birdlock cage you're using. It's okay for short term wear, but hard to keep clean without constantly having to remove it. Also, I found that the air holes have me small edemas on my penis - not fun.
Chastity is definitely a great way to give control over to your partner. When combined with cuckold play, it is so very erotic. The longer you are denied, the better watching becomes. When I get past 14 days, I get totally submissive to my wife and her Bulls. I think I crave watching her take BBC as much as she craves taking it.