If you're doing the "tank exchange" thing then yes, you're getting shorted a few pounds. If you have your tank refilled (RV Center, Propane dealer) you'll get more for your money. Of course, you have to plan ahead or at least have a full spare ready.
I got the non-push button one the other day from HF, $20. Sounds like a jet engine taking off when I push the handle, too much blow back heat firing up the SQ36. It'll get used for putting a char on Sous Vide steaks, got a Weber charcoal chimney for the smoker. RAY