I got one of the original M12 non-fuel hackzalls back in 2011 and not only is it still going, the utility of it's small frame has been tremendously helpful. Inside walls, around pipes, etc. It's slower, but in those confined spaces, sometimes you don't want something too aggressive.
The M12 compressor is also outstanding. Being able to start it and walk away is a great feature.
The Fuel hammer drill is great, but is actually longer than my M18, which seems odd, but hasn't been an issue. The regular 3/8 M12 drill is about as general purpose homeowner as it gets. It's plenty of drill for anything around the house.
A lot of people don't like the jig saw and the right angle drill, but they've been helpful to me in tight spots and where power isn't a priority.
The M12 fuel impact is great to toss in a bag for quick stuff, but can be a lot indoors. I'm looking at the Surge with hopes of a more crowd-friendly noise level.