I've had FC for about a year and will probably renew. For me the biggest benefit is discounted UPS shipping. My company does a few thousand a year shipping equipment to be calibrated and I save enough to pay for my +/- $300 FC membership.

With specific vendors for buying computers and whatnot I found the same thing.... that their codes are pretty much worthless. For me it was with Lenovo. Using the FC code got me the same thing as the never ending sale on Lenovo's website.

Aside from shipping, my biggest savings is getting Diamond status as Caesars properties in Vegas. That saves on resort fees ($40-$50/night), gets me express check-in (can save hours at times) and $100 dining credit/year. I'm usually in Vegas 2-3X a year for conferences or fun so the perks with the FC can really add up.

In the end I think the value just depends on if/how much you will use it.