I really like the convenience of the Milwaukee M18 jigsaw. The cordless jig saw and cordless circular saw make job site carpentry pretty nice.
It's too bad the Milwaukee M18 jigsaw has a terrible blade holder that doesn't hold the blade properly. They're all like that, it's not just a bad copy of the saw. That would have been a deal killer, had I known about it. The rest of the saw seems to be built pretty well, though.
Not having a headlight is a bigger problem than I thought it would be. The way the blade is tucked under the body of the saw, it's tough to see in all but the best light.
The light would be more necessary if the saw would cut straight and you could follow a line. With the crooked blade holder, accuracy is a problem. Perhaps that's why Milwaukee don't feel a light is necessary. lol!
So... I don't recommend the Milwaukee M18 jigsaw but the idea is great, if you use the tool much, particularly if you use it on a job site.