Perfect suction - and really works!
Positives:
Suction is just right; I wouldn't want it any stronger!
Unit breaks down for easy cleaning (and...emergency exit).
Buttons are easy to find and use, and are responsive.
This unit is comfortable and simple to operate.
Also, after using regularly for a month, I am starting to see more frequent, bigger, arousal. For me, this is definitely providing benefits to my sexual health!