Hell yeah its worth $350.00!
Heres why, you get the best materials, the best steal, the best grind,and the best warranty in the business.
I have a GB Folder and can tell you it is like no other folder out there. A Strider AR will pry, cut, hammer, and cut some more. I don't know if the one you saw was BG-42 or S30V but mine in S30V has yet to be re-sharpened and it has seen three months of use.
The overall size of the folder will not be a concern after you handle one for a day, all other folders will feel weak.
The Strider Guys will repair, replace, re-sharpen, reblast, refinish and buff the knife free of charge for the life of you knife! You just pay shipping. Tell me that thats not a good DEAL!
I have used many folders carried many folders i.e. Emersons, CRKT's, Bucks, Spydercos, and others in the search for the perfect folder for heavy everday use. Well I found it in the Strider GB!
Last you get a master heat treat on the blade done by Paul Bos that may not sound like much but Mr. Bos is the MASTER heat treater in the business. Proper heat treat gives your blade edge holding ability hardness and if you talk to Duane or Paul Bos a whole list of other great things that are beyond my knowledge.
AR or GB you will be happy.