I ordered one from Premier products (which I think may be the same company as bootliners) for my G31 touring. I have a long'ish hair dog and also do a bit of mtn biking so dirty kit and bike in the rear of the car. It's a quilted black material which is waterproof. It is fully shaped to the car, comes with velcro that you do need to stick onto the carpet to keep it's shape. I've only had it for a month or so though.
I've got the additional boot flap to pull over the bumper and also the seat back 40/20/20 split which seems to work well. The only small issue is when I use the seat drop down buttons I have to make sure the velcro on the split seat section is apart or the seat won't drop.
I didn't really want to spend a load, but as you, I'm looking to keep the car for the foreseeable so splashed out a bit. Mine was £149.99. It does seem a good bit of kit. I was going to take some photos but tbh, they'd be similar to what you get from the website.