If you want an awesome onahole and are willing to spend some money, order a "KASHIN Version 4" (available in multiple shops). Great durability, feeling, tightness and feeling.
Using it for over a year now. No signs of fatigue, i will most likely buy the same one once at some point gets damaged.
I had "A Fairy's Onahole" (IIRC), would give it only half the rating. But it was much cheaper.
Oh, and as lube, take nothing but "Peace's Lotion". Worth every penny.