Very good point Bill, make sure you know that your truck is in good shape before you take it in. If they say it needs an alignment and you've never had it done before, good chance it does.
That said, I have Firestone's lifetime alignment on my 02 TB, 08 SS, and my brother has it on his 08 Jetta. Had my SS done twice since August, my brother's had the 02 done 3-4 times because I need to flip the UCAs back and see if its better off haha. $129.99 on certain weekends and $149.99 the rest of the time, after the 2nd one it pays for itself!