I think the only one I'd use is the 8mmx10mm one. I cant remember the last time i pulled out an 11,12,9 or 7mm wrench or socket out to use. So $139 of one just seems over the top. Needs a 13mmx15mm included and even then it wouldn't be worth that much.
Cool idea but it is like one of those dog bone things sears sold at Christmas. Seems like a good idea but just isn't that functional.