I rate all my vibrators on their highest setting.
The way I give stars is in comparison to all vibrators not just like to like. In the body of the review I will specifically talk about comparing say one clit vibe to another, but the vroom rating is comparing that toy to every toy in my collection.
Unfortunately, as my collection grows, so does my star rating. Some of my early vibrator reviews... well looking back on them, I was too generous in their rating, and I am the first person to voice that there should be a another follow-up review for a year after publication.
5: Deep, thumpy, rumbley... mmm... in heave... get's me off in under five minutes. Doesn't numb body parts. (at the moment, only the vr6 and Tango)
4: The toy gets me off, but it takes a little bit longer than five minutes, but under twenty. But I still love the toy!!! (G4 Tiger, The Big Boss, Uma, MiMi, Matryoshka)
3: Deep vibrators that should have one more oomph level because no matter how I try I just cannot seem to get off to this toy, but the toy is still a good and decent thump and still get used as a warm up toy. OR buzzy toys that I just cannot seem to make work for my body. (Leaf Spirit, Siri, ummm.... and others I just cannot think!!!)
2: Toys that just when you put them on the table, they don't do anything but sit there. I don't think I've given a two star.
1: ummm... I don't know? Maybe I mistakened this toy as a vibrator but it is really a dildo.