I have a PHL to SFO flight booked in late May. It's 6 hours on an A319, so there are only 8 F seats. Part of me thinks I should snag it now while I can. Another part thinks that using a RPU on an A319 kind of seems like a waste. Other pertinent info: I'm Platinum and currently only 1 of 3 currently showing booked in E+, with two F seats gone. Bargain L fare booked. When I started writing this, the RPU was available. It is now showing as not available. Thinking I may be able to call and book it, so sharing your experience is greatly appreciated.