Eh....
LM-FSS has provided me reasonable service, at least for WX. I always call for a TFR/NOTAM check, rain or shine. They've even called me back a couple of times after something popped up on the maps just after my briefing. I've used them a couple of times enroute to get NOTAMS when I've changed destinations, but my GDL39 does that now. Of course, ATC gets all nosey when you change destinations these days.
OTOH, I will agree that clearances via the 1-800 number is an absolute train wreck. There are a multitude of solutions for that, published numbers, text/ping back, etc. From what I heard from the L-M rep, they've suggested a number of automated clearance delivery/IFR release systems, but ATC wants no part of any of them. Not all facilities are down with publishing their phone numbers, and many facilities simply will not go that route. Strange thing is that SOME facilities require you to go that way....it's one of those frustrating situations where "local procedures" are completely different than what's in the A/FD.
Richman