Certainly cheaper than buying the BL-M591 levers from SJS - BUT do they actually adjust to short cable pull, in order to get the rear Deore U brake to work well enough?* Front brake is V so that's ok.
Seems to be one of those internet searches that comes up with conficting advice :?
*I can get the current V brake levers to lock up the rear U brake, but it take a great deal of effort and there's zero modulation.