I have experience in remote controlling both e-stim devices.
The quality of dungeon lab coyote is fairly good for the money. It comes with a nice App and it can provide some nice sensations. However it is rubbish with mp3 audio stimfiles and the 2B power box knocks it out of the park in terms of power and flexibility.

There are many reasons why I prefer 2B power box. It is much more remote control friendly. I like the 2B’s superior power with plenty of modes and plenty of “oh”, I like its small size, its Stereo audio experience, its ease-of-use and, above all, the blissful sensations it gives slaves, which suits me perfectly. It carries a *lifetime* guarantee — where else can you find that? — and its upgradeable firmware is being constantly updated making it future-proof with many beta versions to try.

The Coyote is ok if you want something that fits in your pocket but it would not be my first choice of a e-stim box and it’s certainly not the best starter unit. It’s too complicated for a newbie and requires some experience.