There are plenty of reviews to check out, it all depends on the user. Glass is my favorite material, and the Gold Laced G is one of my all-time favorite dildos. Look at its product page and select "read all reviews," and see what other people think too.
It really does depend on the user. Most people LOVE glass and are very loyal to it. Myself and a few others don't find it enjoyable at all. The best way to know is really to start off with a cheaper glass toy, IMO.
I would say it depends on how much you like firm versus soft materials for your toys. I really love glass, but some people might find it too firm to really thrust fast without hurting themselves in some way.
I used to think softer toys were better -until I found the glass Caterpillar Shaft.[which found my g-spot] I had tried other hard and glass toys before this one, so I'm still not convinced it was the glass alone but the shape of the glass + the hardness of the glass. I do not know how I survived all those years without a g-spot orgasm! I advise that you may know of a shape that has been particularly orgasmic to you, then try it out with glass or other very hard material. Go slowly at first so as not to harm yourself.
Glass is rock hard, heavy, and well suited for intense, focused stimulation. It's not what I'd choose to give a hard and fast pounding, but it's great for rocking smoothly against the G-spot. It has a lot of fans for a good reason.
So far glass is by far the best I have ever used. It feels every movement and carries it as waves of vibration type feelings, it is sooooo rigid that no matter how girthy it is I can always hit the g-spot, and I am size queen but glass just seems to feel thicker then it actually is. I don't think you'd be unhappy. But all you can do is try