G-spot vibes are one of those things that are "worth it" if they actually work with your anatomy.
If it did, and you preferred smooth to the texture of the Iris, sure, go for it if you have the money.
It's rechargeable. Is that something you want in a toy ? Do you care how loud a toy is ? Do you care enough about aesthetics to pay that much ?
I've never bought a single toy that was $150, but I have a few that were around $100. I don't regret them, I spent a long time researching them before I invested.