Not to get off the F9 topic, but the performance of the WN site is stunningly frustrating IMHO and I second the motion that Frontier (hopefully) will not have a similar fiasco.

For an airline that essentially forces you to only use the website or call center, the website needs to be a Cadillac, not a Vega. The current Frontier site definitely has some significant functionality shortcomings (high among them is working with resevations you've already made), but at least it is generally quite useable for shopping and purchasing.