Both times I found business class tickets for not a crazy spread over coach retail and significantly below the business class prices I was finding on my own.
I've had great experiences both times. For complex / long haul flights where you want to find a cheap business class seat, I'd recommend them without question. I'm a big fan of flightfox.
That said, I did receive tremendous feedback from Todd. Reading this post has me reassured that he and his team are on the right track.
My wishes—
I wish I had the money and time to seek out such types of fares/trips more often so that I could try the service again. I may have one such trip coming up but I still feel reluctant paying a fee up front for what might not turn into anything.
I wish FlightFox/someone would offer services to deal with the airlines' kerfuffle on multi-destination, multi-carrier flights. I swear, if you have to deal with any inconveniences in a situation like this, it is 100% "Hi, this is ABC Airlines, you'll have to call XYZ Airlines as this leg of the trip is under their control" and vice-versa.
In the old system, there was always a lot of tension when we'd refund customers, because the experts would have already spent a lot of time. But in the new system, we made it so we (admin) can't actually refund you, only the experts can. This has worked wonders because they now use refunding as a form of segmentation. Often they'll refund after 30 seconds if it's clear they can't help, which is a far cry from the amount of effort they'd previous expend before a refund.
It's definitely better for longer trips, but NYC-Paris is a good one for us because I know our experts have a few tricks up their sleeves with this route.
I often fly Montreal-SF so can also comment on NYC-SF. If you just want the cheapest economy flight AND you have checked bags, no, don't use Flightfox. However, if you have carry-on, then our experts can help.
It gets much more interesting if you want to fly this route in business. I've done it a few times in business for about economy prices (usually a little less). It involves a few little tricks and a slightly complex booking, but for those who do it often, it can reduce the pain of 12 hours in econ. I usually only go to SF for a day or two, so being more relaxed has a noticeable affect on my time there and proceeding. It's not always available, but I'm usually pretty flexible.