Obviously, being glass means careful handling. I'm used to glass cups, etc. so I always warm this press with hot tap water before ever putting heated tea water in it. When I do, I add just a small amount at a time and swish around so the glass gets no heat shock. My only complaint is that unless I manually straighten the press filter each time, I don't get a good seal and end up with bits of tea leaves floating after the press has been used. Minor issue actually but I wish the press was a bit tighter. I had to hold it up to keep it from dropping down in the press before the tea brewed. Again, a minor issue easily solved but my other presses stay in place. All in all, it is really lovely & a pleasure to use on a tray with a lovely cup or mug. I saw other had theirs break so I'm taking extra care plus Tea Forte said they'd replace it if it did. Glass requires care and perhaps some more than others. Pre-warming gently seems to be doing the trick.
It was not the size I thought it was going to be. That is a error on my part not paying attention to the description. But, it was very disappointing as I could just use my own coffee press. I understand now that it was tea press for one but, it just seems to be a waste of money to me.