Stick to a magic wand. Vibrations aren't strong enough and doesn't stay in very well. Needs to be a bit less flexible so it will stay pressed against the clit. The thinner part doesn't vibrate much at all. Not worth the price. If you need strong vibes to get off then use a magic wand and have your partner hold it in position.
Noa is a wonderful foreplay or warm-up vibrator for me, but the vibrations were very weak considering it's rechargeable and so expensive.
The penetrating, rumbly-ish vibrations are a redeeming quality.
I was disappointed that my Noa goes dead so quickly! It dies quicker than any toy I own - 40 minutes top and it's dead.
The groove on the tip did do wonders for G-spot stimulation and this is plenty small enough to use comfortably during intercourse, even for a gal like me who cannot handle other couple's toys like the We-Vibe.
My preferred method of use for Noa is inserting and letting the outer portion rest against the clitoris. I've even been able to "wear" this by inserting under my jeans! It made for a fun car ride.