I use 2 of them, and they are alright, i wouldn't recommend them, there are probably better alternatives. I use to think they were great until i realised the flaws.
1) the pump has no internal clock, it seems to dose a minute later each day which means you have to connect to it more often to resync the time. Not sure how much it would stray as i connect to the pumps each week.
2) sometimes i have trouble connecting to a pump for a couple of hours, doesn't happen often but it happens.
3) it is very easy to setup i have to give it that, it can he done in a couple of mins at most. The best thing about it.
4) you have to calibrate it a lot, i do mine every month. Sometimes you have to trick it by an extra ML as sometimes it doses a little bit more than it should.
5) if theres a power cut you have to connect to it to resync the time. It will probably still administrate the dose just will be at the wrong time.