This is why I'm switching from Verizon back to AT&T:
Verizon has had LTE where I live for going on a year now. Unfortunately, they only seem to have it on 60% of their towers, so their LTE coverage here is NOWHERE near as good as their voice/3G coverage is. The photo above is from my Verizon LTE iPad -- 1 bar of LTE signal. My Verizon iPhone 4s, at the same location, has 4 bars of signal. That's how inconsistent their LTE signal strength can be compared to their other network.
If you're near a tower here that has LTE and are getting 3+ bars, their LTE here is great, 5-15 mbps. However, if you're in one of the many areas between LTE towers and get 1-2 bars (which isn't uncommon), the speed drops dramatically, to where AT&T's 4G network here can be 2-3x faster.
For me, there are wayyyy too many of these slow areas for me to consider doing an LTE phone with Verizon. I figure I'll give them this year to come back and finish putting LTE on ALL of their towers here, and decrease those gaps, and then I'll reassess next year. However, I'm not a fan of them only having "Share Everything" plans (which are more expensive, for less, the way I use my phone), so I doubt I'll go with them next year anyway.
It was really surprising to me to see Verizon's LTE network here in this condition, a year after they turned it on and started advertising it as the fastest network around.