I actually put a deposit on one a couple days ago.
Aesthetically, the ARC actions look pretty odd; you have to look at them from a “form equals function” standpoint. When you have a chance to play with a Mausingfield in person you realize that every aspect of it was designed for functionality first and looks second. The bolt knob design is definitely out there but it really does work better than a regular ball type knob. I’ve spoken with Ted from ARC on multiple occasions and the way he thinks and designs his products is truly facinating. To call him a polarizing personality is an understatement though. A buddy of mine spent a day shooting with Ted and can’t stand him and wont have anything to do with the Mausingfield action because of that.

I’ve been wanting to build a rifle on a modern long action CRF action for a couple years but just couldn’t find one that I reall wanted. I love the Ruger M77 Hawkeye action but you can’t buy just an action and the aftermarket support (triggers/stocks) just isn’t there as well as a relatively short mag well. I looked at the Montan 1999 action but I wasn’t impressed. Same goes for the FN/Winchester actions. The Bighorn TL3 isn’t a real CRF ( controlled round push feed poser....

). I’ve been seriously looking at the Mausingfield but I just didn’t want to drop $1600 on the action.
I figured that for roughly half the cost ($850) of a Mausingfield I can try out the Nucleus action on the next project. I doubt that I’ll see the action until mid summer even though they’re saying mid spring delivery. That would give me time to figure out what exactly I’m going to build.