There are a lot of reciprocating saws on the market today; unfortunately some masquerade as a 'Sawzall', but Milwaukee invented the genre decades ago and, quite frankly, nothing is even in the same league as a genuine 'Sawzall'.  DeWalt, Makita, Ryobi, Hitachi, Porter Cable all make reciprocating saws; some are professional grade, some say they are and some are just consumer models.  When you decide either through using lesser tools or simply want to own the very best, Milwaukee stands head and shoulders above the competition in the reciprocating saw market.