Digital BW, The Print

Has anybody used the empty top fill 1280 cartridges from 
MediaStreet?  I've been using the bottom fill empties from MIS but 
saw these and wondered how they work.  It takes a syringe with a long 
needle so you can enter from a hole in the top but fill from the 
bottom.  Not sure there's any advantage really but the last carts I 
got from MIS were very poor quality.

Thanks,

Tom