Cobalt DreamsI really do love this toy; it is beautiful, well designed, and effective. I believe this toy will become a go-to for me. It is lovely.
I think this toy is perfect for G-spot play, for both those experienced and not. There can be slight variations from toy to toy with glass pieces, but as long as you know to expect this, it's not really a problem. Like any other glass toy, the Deep Water G is also great for temperature play. Just make sure not to take it from one extreme to the other. A bowl of hot or cold water is enough to change the temperature for me, but you could also stick it in the freezer or microwave for a very short amount of time. Just make sure to test the temperature so you don't harm yourself. With temperature play, it is also helpful to make sure to use lubricant.
As with any glass toy, please be careful while playing; it is a very firm material, and thus it is easier to bruise your cervix than with other toys. It seems the best use for this toy is solo G-spot play. You could also use this with a partner, but just make sure to communicate with them.
It is shaped with a nice girthy head and has several bumps up the shaft with one on either side underneath the head. The bumps add a mild sensation, but I don't think it will be too much for most people. It's just a nice amount. There are two bulbs on the other end that could be used for insertion, but I just use them as a handle.
Pyrex glass is very sturdy and easy to clean. Since it's such a solid material, I'm not very worried that I will damage it. I just store it in the included bag.
This toy is glass, so you can use any lube you want with it. I normally stick to water-based lubes, but you shouldn't have a problem with any lube you wish to use.