My boyfriend and I (gay dudes) both love the Spinner series. We've tried various masturbators/flashlights/what have you, and the Spinner is hands down our favorite. The selling point for us is that they are not too bulky, while still being thick enough all around, and durable. Not being enclosed in a plastic case like some of the other products we've tried is also a huge plus.
For me, I found it difficult to go all the way with other masturbators, especially ones encased in hard plastic shells. Spinners don't have that shell and the actual experience using them is much like just jerking with your hand, just with all the benefits of the new sensations from the Spinner (whereas something bulkier with a hard plastic shell you have to change your grip and hand motion, etc). When we masturbate together, a bulky cold plastic shell can kinda get in the way. Thinner, egg-style sleeves were too thin and didn't really do it for me, either. Spinner is the happy middle-ground, having the benefits of both with the drawbacks of neither. They're also quiet, which is a huge plus because ones with small holes that let air in and out can be distracting. Spinners are also thin enough that we've even used them as a "replacement hole" when one wants to penetrate the other but we don't want to deal with the prep/cleanup of full anal; just slide it on and hump each other (though this way doesn't have the spin action, it's still very pleasurable).
When used with hands, the spinning action is very pleasurable. We've tried 5/6 of the spinner varieties (all but 1-Tetra), and they're all very pleasurable. My favorites are Hexa and Beads, but they're all great. Brick is the most distinct of the ones I've tried. I imagine it would be the most divisive (either your fav or least fav), so I would recommend one of the others to start, and then try Brick for something different.
Cleanup is pretty easy, we just wash out the inside with warm soapy water for a bit, then rinse. To dry we usually roll up a paper towel (like a burrito) and stick it in to absorb moisture, then pull it out. Then take another dry paper tower to go around the outside of the spinner and set the spinner back in the case leaving it open on top to let the remaining air dry.
They are very durable. With proper cleaning to prevent infection, you can likely get very many "sessions" out of them.
