I put the Long Trails on my '06 Mountaineer (18" wheels) in fall 2010 shortly after we bought it used (originals tires were shot), based on recommendations on Explorer/Mountaineer chat site as best bang-for-the-buck. We've been very happy with them. As was said above, they are quiet, and seem to grab just fine during Michigan winters.
3 years and about 30,000 miles, and they still have at least half the tread remaining. How that translates to your F150, likely in a different size, is unknown. But we're very pleased, and will get them again when the time comes.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller