Bob No problem with germination. Non-F1 are no less reliable than F1, and since there is a greater natural variability you're more likely to get plants that grow well in slightly sub-optimal conditions. Since they're not F1, you can save your own seed and they'll come true - F1 you'll need to buy fresh every year.
Brief summary of F1 in terms that I can understand:
Take two stable varieties and cross fertilise them, in order to produce a new variety with some desired characteristic. For simplicity, just think of one particular gene. First variety has two copies of gene A. Second variety has two copies of gene B. So variety 1 gives an A gene to the offspring and variety 2 gives a B gene, so all the offspring are AB. This is the F1 generation ("Filial" I think the F stands for).
Second generation F2 obtained from F1: each F1 parent can give either an A gene or a B gene. So the offspring can be AA, AB, BA, BB with equal probability, so basically one quarter will have two A genes, one quarter will have two B genes, and a half will have one of each. This variability is why they say you can't save the seed of F1 varieties.
Now imagine several generations later, and the same thing happening with all the genes of the plant - you'll still have variability, with most of the resulting plants being somewhere in the middle. This is what happens in the wild, when you sow some red campion seed and get red campion plants, but with some variation (eg some with darker flowers and some with lighter flowers) and it's what happens in non-F1 garden varieties.
F1 varieties tend to be vigorous, which is why we grow them - but they're great for the seed producer because they have to be re-created from the parents every year, so everyone has to go back to the seed producer for new seed every year. Their other advantage, of uniformity (they're all AB genetically) is of use to the agriculturalist, but less useful to the gardener, who may not want all his crops to be ready the same week - more variability and hence a longer cropping period is a positive advantage to someone growing just for their own family.