Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nearly useless!

This saw starts and runs well enough. It also has enough power for what I intended. However, the "Patented Tool-less Chain Tensioning System" renders this saw nearly useless. You'll literally be tightening the chain every five minutes. No matter how tight you turn the cheap, plastic, fold-out piece that tightens the bar into place, the chain will loosen in five minutes or less. Also, the plastic housing or the gas cap itself has apparently absorbed the gas/fuel and now requires a large pair of plyers to remove and install. It's impossible to turn by hand and almost impossible to get it started back on. If you need a lightweight, inexpensive saw, Poulan is okay. Just stay away from the ones with the tool-less chain tensioner.