i've also got the one from costco. i've used it about 15 times in the year or so i've had it...works wonderfully.
just plug it in after 4 or 5 uses and it's ready to go again...
the only extra it has is a compressor, but its well hidden.
i've used the compressor 2 or 3 times and its a good, slow backup
to my viair.
it was about 40.00 and i got it for xmas. i'd say its a bit bulky compared to some that have come out recently but its been very reliable, so i'm reluctant
to replace it for a "newer" version.
regards,
Brian