I've been using the PNS since it's been out (1 yr now).  I have to say that I
was very skeptical at first.  I gave the first one I got as a gift to my
cousin after she had a baby. (I experimented on her !) We used it to relieve
some engorgement and I was thrilled with it's performance.  I have sold 56
PNS in the course of the year and only have had one client who had purchased
the PNS and was not happy(she had rented a L----first)  She ended up buying
the L---.  But overall, when I've gone in on consults where the mom already
has a PNS, we have used it to aid in decreasing engorgement and have also
used it to increase supply with satisfactory results.  Like the rest of you,
I do not and would not use it for a preemie situation or any situation where
someone is pumping 24hrs/day 7 days week for an extended period of time.  I
basically explain to a mom in a "normal" situation that if she is going to
rent for longer than 3 months (including the purchase of a DP kit) it may be
more cost effective to buy the PNS.  I think it performs well but will never
replace the rental pumps.  Also, even though the PNS is single-user pump, we
all know that moms share them or lend them to each other.  I have no idea but
can only speculate that they may not hold up well after multiple users.  I
must also have to add that I am not pleased with the  incredible price
increases since it has been out !

Maria Parlapiano RN IBCLC
The Lactation Resource Center, inc. in NJ