I HAVE HAD A CHINESE 4500 # COMPRESSOR FOR 9 MONTHS AND I AM VERY HAPPY WITH IT. I PUMP TO 3200# FROM 0# IN ABOUT 4 MIN. 1800# TO 3200# IN 2.5 MIN. THE ONLY PROBLEM I HAD WAS SEALING MY HOSE FROM LEAKING. I FINALLY USED "J.B. WELD" AND NO MORE LEAKS. MY PUMP IS THE ONE THAT HAS A GOLD COLOR TOP...