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As a sidearm that can live in a (tiny) bag or pocket it's appealing. For me the fact that you can use the centrotec system easily with it if you want it is appealing. That probably puts it over the edge for me.
Bear in mind I'm mostly joinery and property maintenance so my use case is quite close to diy but not quite as rough and ready as carpentry or full on electrics and well clear of the state most builders get themselves into! I don't need to put up scaffolding with it, just need it to hang gracefully and reliably from my holster pocket as I pop a door on its hinges. The small Festool has amazing slow control too, so handling smaller screws is easily possible. Torque control is real and reliable which comes in handy if you don't want to ruin your elbow.
I'm also piloting almost any new screw holes since that's best practice by far. I can understand there are times when you want to percussion drive 100 10" bolt head screws bare back into a sleeper but that's not my style and the finish quality wouldn't pass muster on my jobs.
For larger holes like door lock body mortices etc. I use a hand powered drill with some ancient forsteners you can pick up on Ebay in sets for silly money. It's much easier to control the results and fast enough.
Airhead-
That's interesting. Our jobs sound similar - tool demand wise. I've been eyeing a 10.8 system for ages but just haven't bought the bullet. I do a lot of assembly/light duty stuff, and having a handy and lightweight drill with a selection of chucks would be super useful. But I'm over buying new tools and try and only make essential purchases.
the finish quality wouldn't pass muster on my jobs.
Can you come do building maintenance where I work please? We're always joking about how shit building services are (the company, not the trade). Pay peanuts, get monkeys etc.
Nef
Any reason you'd go Mafell over Bosch, Metabo, Milwaukee? They've all got 10.8~v drivers with that chuck system now. I've got a Mafell track saw, but I'm not sure I'd want to commit to their 10.8v platform.