I have gone through about 40 lbs of pellets at this point and found it to be very reliable.  Just be sure to follow the set up instructions exactly as noted for initial use.  I have not experienced any wild variations in temperature levels.  It is important to NOT open the lid but let the unit stabilize the temperature until it reaches balance.  So far I have smoked 4 giant chicken breasts, 2 briskets and also used it for regular grilling of hamburgers and hot dogs.  I found the unit to be easy to assemble and only took me about an hour by myself.