Why would you refill and use a tire that had gone completely flat without getting it checked out?
Guess it depends what you want the compressor for. Personally, I find the Viair about perfect for on the road use. It takes up very little room and when I am staying somewhere for an extended time, I can drop the rear tires on my truck down to 50 psi because I know this little compressor will get them back up to 80 in short order.
Downsides, You can't set the output pressure so I wouldn't use it to blow out water lines and with no tank, it can't be used for air tools.
