I am not much of a traditional chastity player. I've had a couple of the plastic CB-x000 devices, and have worn them for a few days to a week at a time. My rather dispiriting experience with them was that they would be put on and then forgotten about by the Lady. There was little to no teasing or discussion, my genitalia was simply vanished into thick plastic, and that was that. I did not see that anyone derived much enjoyment from this style of "play;" I think it was a combination of misandry and absent-mindedness on these Ladies' parts.
I have also, however, had positive chastity experiences of a less traditional nature.
For one, I have a KTB device that we occasionally use for a few days at a time.
The thing I like about this device is the pain. I'm not into bondage, I'm not into control, I'm into pain, and the KTB gives me that. My favorite is to have the KTB put on before a play session, so that my excitement causes me pain.
The other chastity experience is a device-less, long-distance, long-term one. One of the Ladies in my life had an accident that caused significant cognitive impairment (now mostly better). Once she recovered enough to even converse with me, we began to play a game.
The basic game is that I would masturbate each morning, and she would decide if I got to come or not. I would video the masturbation and send her the video. We're coming up on two years of this game, and we both still enjoy it immensely.
At the beginning, we had an interesting problem. Her cognitive impairment was such that she simply could not make decisions. Decided whether or not I got to come was stressful and impossible for her. We solved that problem by my collecting my photos of her, and then choosing one at random when I was ready to orgasm. If the photo chosen showed her smiling, I got to come. If not, I had to go without.
We started with a 1:1 ratio of smiles to non-smiles, but eventually worked it up to about 1:7, so I was getting to come about once a week, which seemed to work for us.
As she improved, we changed the game. I stopped using the pictures, and instead she got a bag of marbles. Each evening, she draws a marble and sends me a voice memo to tell me the marble's color. In the morning when I masturbate, I play the memo at the moment of truth, and learn my fate.
Now, she's nearly fully recovered, but we still play the marble game. She does not, however, always let the marbles decide; she takes an active role much of the time.
She credits our daily interaction over the game with helping her recovery, as it was a moment of routine and pleasure for her in what was a very chaotic time in her life.
So there you have it: Chastity as brain therapy. :-)