Alright Frontier loyalists, I'd love some advice...

I'm EXP on AA, but for an upcoming wedding this summer, I found a fare that's @$300 cheaper on Frontier for two tickets (technically it's a Midwest flight, but on Frontier metal). I normally wouldn't even consider this, but $300 pays for a couple nights of hotel stay. Here's how I see it:

Pros: Savings
Cons: Slightly further drive (MKE is about 45 mins further drive for me versus ORD); less flight options, need to go carry-on only to avoid fees, no upgrades to first, no mileage credits, less flight options if I get stuck, more feeling of being treated like cattle =)

Maybe I'm nuts to even think about this, but thought I'd see if there's anyone out there in Flyertalkland with some perspective. I've never flown Frontier, so any thoughts from loyalists is appreciated.