Other than that, what is the reason you like them? Like if they are really good I might get one.
Because they are cheap. Wiring a CP with minipac is 20 minutes work and it saves me time (priceless).
Other +es are easy to reprogram. 1 USB cable taking care of spinner, TB, sticks and buttons. Tiny and no need for troubleshooting. It is just 84$ including shipment. Not the cheapest (I ordered a complete PC for 27 euros! incl free delivery). Never take the PC port ones: that interface is dead. In 5 years no PC will have it (the 27 euro one I ordered has not, yet it runs MAME great!), but your controller will still work.
With GGG it is "Sub-Total: $77.85" (optiwiz, usb thingy and cables) excl shipment. And for that price I don't know if it works as easy.