I held off buying anything from Nunatak for the concern that I was paying for something simply overhyped. Eventually I purchased a pair of their booties and then returned them after they were twice the weight listed which followed extremely poor communication. To say the least, I was not happy.
After over a year, I ordered an Arc Alpinist when Tom advertised having one on sale from someone who was 6'8" who decided he didn't want it after it was made. At 6'6", I figured it was worth the discount to give it another shot even though the color (red) wasn't my first choice. It arrived in an 8.5" x 11" envelop which quickly made me think that I made a pretty big mistake as I didn't think there was any way that anything in the envelope could keep me warm to 20*. I pulled it out, put it on a table, and walked away for an hour. When I came back, it was amazingly puffed up even more than my Western Mountaineering quilt. Over the course of the next two weeks, I used it and it was true to temperature and extremely well made. I was so impressed that I recently ordered a Skaha pullover which I'm waiting on now.
In short, I had a bad experience and ultimately came back and the product delivered was top notch. JRB and others didn't have the high tech fabric or the custom size, so Nunatak got my money. But, everything is expensive. With that said though, there is a lot of gear on the market that is plenty "good enough". It's whether you honestly feel you "must have it" and have the money.