It's made of polypropylene, partially recycled, extremely durable, and again fully recyclable if it does reach end of life at some point. It's also certified BPA free - as opposed to the very first version (that was transparent and used a different plastic). BPA doesn't leech into water unless exposed over a very long time anyway, and the average brew time is about 3-5 minutes; but it's good they made the change anyway. If I remember correctly, BPA became an issue mostly due to being in baby toys that are chewed on, or bottles for beverages with a very long shelf life (e.g. water, that practically lasts forever) where it can leech out over time.

To me it's the ideal travel brewer, since I can pre-grind my coffee and keep it in a tin box, where I can also put a stack of filter papers in to keep them from getting wet. Glass just wouldn't work on the road, the risk of damage is simply too high. And you'll anyway need to have a plastic plunger, or at the very least a plastic coated one, since you need to have a 100% tight seal.

At home I don't use it often since I have a decent espresso machine, but I can see the merit as a daily driver in a small kitchen.

Edit: Oh btw, if the body was made of glass, I can totally see how it would shatter someday while applying force. You have to push with quite a bit of power the water through.