To export several sets, go to the exporter. If you use the data I'd really appreciate a link back to Brick Insights. It keeps this site going.
It is really fun to dress Mario up and have him walk up walls, but it's probably the cute look and cat sounds that are the biggest draw this Power-up Pack has. Whether it is worth the £8.99 will probably depend on how much game time a user is getting from the sets – those spending a lot of time playing can probably justify an extra outfit or two.