For a bouldering season at Lake Tahoe I had two Metolius Stomp pads and a Launch Pad. Sometimes I would take one Stomp if there was a big approach or I was doing short problems. And sometimes I would lash two Stomps together with the Launch Pad for highball projects — the Launch Pad added protection where the two pads joined each other. The Launch Pad helps protect the seam where two pads meet. Even better, it offers another inch of soft foam, which is especially nice if your other pads are pretty stiff. Because it uses a soft, fuzzy material on top, it cleans shoes well and is nice to hang out on. Because it has a plastic back it is very durable. This is also a good pad for tight, overhanging sit starts where you want most of your pad out where you are more likely to take a bigger fall. It can also be used as a comfy CrazyCreek-like chair.
This pad is too thin to be used on its own except maybe before sit starts where you would only fall a few feet or less. There is no easy way to carry this pad on your back. If you try to use the two long straps as shoulder straps, the pad hangs too low. This is not a huge deal because most people who use the pad will be lashing it to other pads.
Considering this pad can't be used on its own and is mainly for just lashing two pads together, this pad is kinda expensive. For another $60 you can have a fully functional pad. That said, if you add up the price of two Metolius Stomp and this and compare it to other jumbo-size pads, its not a bad deal for its versatility. For $10 more check out the Metolius Bouldering Shield that is the same size but has 2 extra handles on the back for spotting and a softer "Ultra Suede" top fabric in place of the upholstery material that is on top of the Launch Pad.
This is ideal for boulderers who have two small pads that they want to to lash together (see likes above).