Did a bunch of comparison shopping, and ended up getting the Cycplus A2 as a surprise birthday present (it was on my shortlist).
Compared to the popular Oasser pump (and others with similar specs, though I've only seen the Oasser in action personally):
Pros: small, lightweight (under 365 grams with the supplied pouch). Includes cage for bottle bosses. Gauge within 1 PSI tolerance compared to Topeak digital gauge. The Cycplus reads a little higher in comparison. Like many others, can double as a power bank or flashlight (not a big deal but a nice "just in case").
Cons: a little slower than most. Smaller battery than most. A little noisier than the Oasser, but this is through recollection, not measuring dB.
When I first got it, I tested it out by pumping up two tires... one 20"x4" and one 50-584 (2" 650b) from flat.
The 20"x4" took just over 4 minutes to get to 20 PSI, and just over 2 minutes to get the 650b up to 38 PSI, on one charge. There wasn't much battery left at that point. Don't know how MUCH, and I doubt I'll ever need to find out (knock on wood). Based the battery gauge, and other other pumps with bigger batteries and their estimates this might get a 3rd tire part way there, at best.
Bottom line:
Not the fastest, but enough to deal with a couple of flats on a ride (always hope for zero

). If you only want a powered pump for bike tires and smaller things like basketballs etc., then it's worth considering.
If you want an inflator for your car/truck tires, this probably isn't it. It just doesn't have the battery life, and the pump strikes me as less powerful than others. You MIGHT get a car tire out of it, maybe, if the pump can hold out. That would be my guess, and seems to be borne out from some reviews.
Great for bi-weekly bike tire top-offs at home, and there's no reason not to throw it in the trunk bag on an afternoon (or longer) ride, given how lightweight it is.