I ordered this clasp to replace one I got from Amazon that had rough edges and uneven clip rings, both of which itched. This one is smooth and rounded, the clasps are easy to open, the magnet super strong. I've gotten pretty good at taking off and laying the connected necklaces down flat with the chains extended to avoid tangling. But when tangling happens it's easy to take the clasp off and straighten them out.
If you're looking for a clasp to layer two or three chains, just get this one.