Can you use it while asleep? There is one breastpump out there that claim it can be worn like a bra and you can pump while sleeping (so, laying on bed). That gives a much bigger advantage.
Also, what's the quality of the pumping? Is it hospital grade?
This strikes me as one of those "Ah-hah" projects, why didn't someone do this sooner. Breast pumps were ripe for disruption. One thing I don't see is how cleanable it is/whats the cleaning process. IMHO, that's one of the biggest headaches for today's breast pumps.
Also, what's the quality of the pumping? Is it hospital grade?
Price range?