I love it, and hate it.Not an orgasmic toy for me, uncomfortable and awkward for vaginal or clitoral stimulation, but fun for massaging yourself or for couple play.
It does work really well for a neck massager when you are on your own.
I personally preferred the TPR side against my skin, but that sometimes caused issues if I was trying to hold it with the plastic side. It tended to be a little slick, especially with any sort of lubricant. Also, the vibrations are based in the plastic side, so that is a downfall.
Luckily TPR is hypoallergenic and phthalates-free, so there aren't many worries with it, just make sure you keep it clean.
I do like the "nipple" shaped on/off button. The same button also controls speed, and there are 3 speeds.
According to my measurements, the ball is 10 and 1/4 inches in circumference, 3 1/4 inches in diameter.
To get to the batteries you untwist the halves of the ball in opposite directions. It uses 3 AA batteries. There is a thin rubber seal around the edge of the TPR half that makes this ball waterproof.
The Pleasure ball seems fairly well made, and is fairly heavy, though not overly so.
The Pleasure ball doesn't LOOK like a sex toy, so it is fairly easy to conceal, but I wouldn't recommend it for travel as it is fairly loud, and seems to get louder the longer you use it.
The ball is very noisy. It started out fairly quiet...but everytime I use it it gets louder and LoUdeR and LOUDER. Now it is loud enough that you can hear it from another room, sometimes with the television on!
Using the ball in water caused no additional issues. Afterward, I checked the battery compartment and found no water. I did find it to be slippery in the water, and if it touches the bottom of the tub or sides, the noise is deafening. For some reason, it tends to have stronger vibrations in water. On dry land I seemed to keep the ball on either medium or high, in the water low to medium.
TPR can be used with silicone or water-based lubricants with no interactions. I keep this toy stored in a velvet bag in our "fun chest" but since it doesn't react to anything you don't have to keep it separate from anything.