CB 3000 and Her Delight

Any CB users out there use the "Her Delight" dildo attachment? This device is a favourite with my wife. For those that do not know, this is a hollow dildo that works with the CB chastity system. It replaces the tube part with a hollow dildo. The chaste male puts his penis in the dildo and attaches it to the ring of the CB. Now you can pleasure your partner for as long as she wants, in any position she wants. Your are making love to your partner as you normally would but your penis feels nothing. It is nothing short of exquisite. I'm putting in all the effort, and my wife is getting all the orgasms.

There is nothing quite like the feeling of going through all the motions of sex, seeing your partner roll through one explosive orgasm after another, and be totally denied the physical sensations of her lovely pussy. Especially if thoughts that her lovers experience all that PLUS cum in her!

That sounds great. My gf and I have done similar things with a strap-on but it doesn't fit to the base real well so it sort of moves around and it is hard for me to control (or maybe it's just more difficult since I'm not actually in her).
Does your system work any better?