is a sawsall the same thing as a reciprocating saw???
yes
what is blade length I should get
depends on what your cutting. shorter fine tooth for metal, longer less teeth for wood.
and how critical, if at all, is a variable speed on the saw.
They work pretty good on those pesky police cars too...Here's a practical use for a reciprocating saw - cut the bow off a navy ship.
Navy mine sweeper ship ran around on a Philippine reef. They couldn't float it off the reef so they are cutting it in sections and are barging them out. Mine sweeper hulls are wood and fiberglass not metal. Sawzall to the rescue!
http://www.cnn.com/2013/03/27/world/asia/us-navy-ship-aground
Sawzall - made by Milwaukee. All others are imitators. Useful tool - variable speed is a must, for starting cuts with precision, also avoiding hacking stuff inside walls where you can't see it. Watch out for blade orientation. Some go with teeth up, used to be all had teeth down. Some rotate, can go any direction. If you put the blade in backwards, it will hold, but not very well, and will damage the blade holding mechanism. Don't ask how I know this.
I have a Milwaukee corded that my dad gave me as a Christmas present my first year in my house many years ago...I've used/abused that thing and it still works flawlessly.

I thought they were made in Mississippi. Anyways the show Modern Marvels had a show on about saws and that's where they said they were made. Could've been an old show too.Sawzall® is a registered trademark of Milwaukee Electric Tool, who I now call Bejiing Electric because they are all made in China now.
I have older pre ChiCom models which am quite happy with.
