Instruct: Classify the given review into positive or negative sentiment.
Query: BIG UPGRADE

I never knew what a good nail gun felt like until I tried porter cable, man am I hooked. My old guns would always jamb and sometimes just not fire(I think unjambing took longer than the actual job). These porter cable guns are perfect I can finish the job without the hasle of the previous tools. My love for building things has come back to life..., oh and the compressor is great too! I got them for a great deal on amazon but now I would actualy pay retail to get this package!