If you wanna save a couple bucks and get non-whatmans, you're in for a fucking headache.
For whatever reason, whatmans are the best by VERY far in terms of quality, flowrate, total capacity/filter, durability etc etc. Ive blown and clogged enough millipores to fill a dumpster. ive tossed many of em after 10ml or less. I can only imagine other no-name filters to be even worse.