I went to a workshop last Tuesday and the Block Loc strip ruler was recommended by the instructor. She wasn't selling them or had any ties to them. Another member and I were the only two that had the Block Loc. The others said it was too expensive and wasn't necessary. Wasn't long into the cutting part that the "May I borrow your Bloc Loc" started. The other member was much nicer then me. She was loaning her's out and ended up having to wait to get her own ruler back to cut her strips! The instructor said she didn't loan out her teaching tools, yeah for her.