What is Reddit's opinion of Sinclair Institute Select Verve Vibrating Prostate Massager?

From 3.5 billion Reddit comments

Eh bad dragon is kinda expensive for me. I was thinking maybe something like this but Im not sure. I dont wanna waste money on something that doesnt work. Though if BD has something along the lines I want I MIGHT be interested in seeing it

This and these are basically the same effect you are going for (a bullet that will vibrate inside you), but a lot safer. But with these particular toys designed for anal play (long handle, no flimsy attachments that can break off inside easily) the chances of losing them inside you are much lower.

http://www.amazon.com/Sinclair-Institute-Vibrating-Prostate-Massager/dp/B008AJKJEK/ref=pd_sim_hpc_5?ie=UTF8&refRID=001KQDYJ6YRV664WGMVX This is what I use but I can't seem to keep the pleasure constant. Any pointers?