As an ultralight option, for people who hardly ever get punctures they are a good option... But they definitely require effort. The ipump floor is a lot easier to use, and takes less effort, but is longer than the regular ipump. It's volume where they take a long time... Mtb tyres etc
Unfortunately my floor version's handle broke... But Maurice is a great guy and offered to replace it immediately. I just never got around to sending it back.
I have tried to get him to make a lower pressure, higher volume version... But I don't think he has yet.
At the end of the day, it's an ultralight pump to get you going again if you happen to get a puncture, so it will take longer, but do the job.
I used them because I don't get punctures very often, so it was nice having an almost unnoticeable pump in my bag. But on my 29er/+ bike I'm now using the lezyne fat bike pump, which weighs shit loads more, but fills a huge tyre in no time.