My door sets and dovetail sets are Sommerfeld. I really like them. I got the door sets because of the matched shank lengths, which makes setup easier and faster. I also have the EasySet jigs for both Sommerfeld and Freud bits that account different thicknesses. Those star shaped jigs are precision tools that make setup far easier. I also have a number of Freud bits that are excellent, and they now offer matched height sets as well.
I've had several occasions to interact with Mark Sommerfeld and found their customer service to be terrific. There is one other thing about Sommerfeld, and that's the videos on how to get the most from their bits. Marc Sommerfeld was a cabinet maker before he started his company, and his woodworking skills are excellent. You can find the videos on YouTube and they are well worth watching just to learn good technique.
So I come down on the side of Sommerfeld, even though Infinity stuff is very good. And you're right, the packaging on the bit sets is great, beautiful wooden boxes made from blocks carved with routers. BTW, I don't own stock.
The more I do, the less I accomplish.