Originally Posted by rickyk76

Don't overthink it. If there's a big parking lot around, that's sufficient for your initial test ride. You're trying to get a general sense of fit, ride and comfort. Since it's been so long since you've ridden, you're not going to feel nuances that more experienced riders will on a test ride. No big deal. Does the bike fit? Do you feel like you'll enjoy riding it for awhile? That's all you need to worry about. Oh, the saddles gonna be uncomfortable. Don't worry about that. You will need to get used to it after riding awhile and THEN determine whether you need a different saddle.

And don't worry about looking at other makes. You like the Giants and the LBS will help with fit. They're good bikes. The fact that they've given a full credit guarantee is great if you decide they're not the bikes for you. It will be better to stick with the choice you've made, actually get the bikes, and start riding than to bog yourself down another few weeks researching other makes and models again.