Hi Swifty
I got one of these in the mail today so I had to have a test run of my party keg (mmm drinkin on a Tuesday)
I just filled the keg straight from my beer tap and then connected my gas line to the top to purge any oxygen, which was a complete waste of time cos I've drunk the 1 1/2lts I've put in the keg already.
I used a whole bulb of Co2 pretty quickly. I assume it was because of the small amount of beer in the keg.
A quick squirt from the second bulb made it pour too quickly, but nothing I can't live with.
The shraeder (sp) valve started leaking which could be because it froze with the Co2 filling it
The beer I was drinking was a brown ale that is a little overcarbed in my normal kegs (due to the pilsner I've got on the same reg) but it was perfectly carbed in the party keg.
It will be interesting to test a pils.
A couple of things I will be doing is marking the foot of the keg that has the dip tube in it so I can tilt the keg to get the most out of it and I think I will take a bike pump with me (as you mentioned) just in case I run out of bulbs.
Have you tried yours yet?