Hello Tinker - I hope all is well with you!

Yetihunter: no worries.
Drawbacks: The Fein drill is "yet another" battery platform if you have a widespread variety of tools.
It is however one of those drills that definitely grow on you the more you use it.
When the right angle unit arrives I can see myself bringing just the Fein drill instead of bringing _both_ the CXS and the T18. The Impact tags along in the same SYS. And if you consider that the CXS and T18 are not battery compatible and have different chargers the Fein ASCM12C does save both space and weight and hassle on the job site. Also, Festool does not have an Impact (the old Ti15 does not count

).
The thing that the CXS has going for it is the agility and size but in terms of performance and delivery of performance the Fein ASCM12C is truly top notch.
The siblings of the ASCM12C (I don't have all the acronyms in memory) are different.
The ASCM12C is a silent drill, it does not make that "beepy" sound when you run the motor and it feels great.
The compact bit chuck Fein (no drill chuck) is a decent machine but it feels a lot more plasticky and has that cheapo beepy sound in action. It does not rev the motor very high and it is a brushed motor. The fixed drill chuck Fein is the same machine and would feel the same although both the bit holder on the compact Fein and the drill chuck on the regular drill Fein are good quality.
The Fein Impact is a pretty decent machine and considering the price w/o battery charger I find it a good addition to the kit. It is a bit loud but it feels decent in use. It is a brushed machine but has good eonugh power for a small unit.
I have only used it occasionally - I have nothing bad to say about it. It is a just one of those "ok" machines that most other manufacturers make. It is a keeper for those times that an impact is handy to have. For me, not so often but it takes up very little space and it does the job.
The MultiTalent I was hoping would be a keeper as it too would fit in a single sys with the Fein ASCM12C and with three-four batteries, the charger and the ALED light. I forgot to mention the little LED battery light. It is handy and, again, takes up very little space and is nice to have around.

The light and the ASCM12C is a great combo. In tight spaces I just leave the ALED light on. The Fein drill LED is "ok" but not that powerful and I usually prefer constant light over drill lights except for quick jobs.
The MultiTalent feels (to me) a bit underpowered though it does the job. It is however quite a rattler. The old Supercut (and the Vecturo) are both more powerful and less strainous in use. The MultiTalent vibrates quite a lot. That and being underpowered made me choose to sell it instead of thinking it too would fit in a SYS with the rest of the Fein gear. I have a Metabo 18V multicutter which is decent compared to the Supercut and does the job a lot better than the Multitalent both for power and vibration. If you don't have any multicutter and only have limited use for one then the MultiTalent is an "ok" machine. I am spoiled by my Supercuts performance so I am not that impressed though.
The recent MultiMaster machines seem to be significantly vibration reduced I have heard but I have only tried a "dry run" with them. They seem very nice and that is why I ordered the MultiTalent unseen. I was a little underwhelmed by it. I don't use multicutters as much as I used to due to a slight shift in profession but they are still an essential part of my kit.