I haven't tried that particular seed package before but I am kinda skeptical. If there really was an emergency where you needed to use your emergency seed bank, chances are you wouldn't be able to track the company down in the event that the seeds didn't germinate. So in that sense, the warranty on the seeds doesn't really mean much.
I already had a lot of seeds, but I didn't let that keep me from buying more this year. I ordered from this company:
http://www.america-t...seeds/index.php
I spent about $30 and got hundreds of packets of seeds from various companies. While you cannot specify the exact types that you get, you can specify what percentage you want in flower seeds or herbs or veggies. I got 300 seed packs for that price. Lots of different varieties of tomatoes, beans, peas, eggplant, peppers, etc...Since setting up my greenhouse a couple of weeks ago, I can vouch for the fact that the seeds seem to be viable and almost every variety that I've planted has sprouted. For veggies that we don't eat, I just donate those to our summer youth gardening program. I also donate some of the flower seeds to our neighborhood association. Last weekend, I took my big tote bin of seeds to my parents' house and let them choose a few varieties for their garden. I will definitely do this again next year.