i love america west's 757 aircraft, but when i book flying on america west, i avoid flying them at all cost, and i am elite with america west. america west has 13 757 aircraft, and each day, 13 757 are scheduled to fly in their system, and that is from a friend who is a market analysist and planner with hp. with that, i avoid flying them, but they are my favorite a/c in their system. currently, hp flies them on routes out of las to phx and jfk, and maybe still to dca. out of phoenix, the 757 flies out west to las, sfo, las, san, seasonally to sna, seasonally south to sjd and pvr, and back east to msp, cle, dfw, and sometimes a 757 will operate also into den, atl, and ord. although i love flying the america west 757, if one does go down for maint, it backlogs the system. booking a 757 on a route and if it books full to 190 pax, and then it goes down, putting an A320 on the route to fill it still overbooks the flight by 40 pax at least. in the past 4 months flying phx-sfo, this has happened to me 3 times. hp offered pax huge vouchers for later travel, and flights connecting through spokane, boise, reno, and eugene just to get pax off the original hp flights. great planes, they just need one more to be used as a spare. i did hear from many a people at america west, and many friends of mine are corporate with hp and that is why i love to fly them, that hp did look at the A321 a/c to replace the 757 due to it cockpit familiarity with the other airbus a/c, but the A321 was significantly underpowered and weight restricted on loads out of phoenix with the hot/high conditions. flights to the east with fuel and wx min would have to fly at loads less than 70%, nothing compared to a 757, so hp said no thanks.