...and if you read up on some of the ford forums you hear a lot of complaints about ...
I think a lot of what you'll read is because of a double-standard that exists among some people who may (or even may not) have had some issue with it.
If they find one little thing wrong with their TTB truck (say a bad ball joint or maybe they broke a u-joint), the whole thing is suddenly garbage and people should get rid of it because it's unreliable and it'll cause nothing but problems.
Yet the same identical issue on a solid axle will just be a fluke and all someone needs to do is replace the part and everything 'll be golden again.
I've seen this time and time and time again on numerous different forums.
These trucks are 17 years old now at their newest (most are much older). Most of them are bound to need a little basic maintenance and replacement parts at some point here...
Where I frequently
do see legitimate issues with TTBs is in finding someone competent to perform an alignment on one, and in a design flaw that exists in most aftermarket suspension lift kits.
Way too often I see alignment techs who don't change out a TTB camber/caster eccentric for a different size when needed. They just twiddle with whatever existing ones are present until the camber looks decent, and give the vehicle back to the customer (giving no regard to caster alignment). Whether this comes from a lack-of-training (?), or just pure laziness (I would hope not), the end result is a truck that veers right or left when you let go of the wheel and/or it doesn't return to center properly.
Probably 90% (!) of lift kits on the market do not address the steering linkage angle properly (this is where you see the most virulent tire wear problems). This is due to the included dropped pitman arm being too short, which leaves the linkage jacked up at a steep angle causing extreme amounts of bumpsteer (changes in toe) as the suspension cycles (often so bad the tires literally screech going through dips and around curves). Most guys are aware the steering drag link on a solid axle needs to be in line with the trackbar if the vehicle is to track properly... What in the flying heck went wrong here!?? Combine this with the weak lift brackets I mentioned and it's not hard to see why people look down on this suspension so much.
Skyjacker's Class II kits are one of very few having good strong brackets, though they aren't completely without the pitman arm issue. At least they do have a couple arm options available, but you have to know about them.
I wrote
this post some years back for a Ranger website I frequent in an attempt to break through some of the misconceptions surrounding these suspensions (couldn't stand watching others swap out their stronger TTB axles for spindly little Jeep D30s). Though it's focused more on the smaller Ranger/Explorer/Bronco II trucks, a lot of it applies to yours just the same, so maybe it could help.
As it mentions, TTB axles will not be for for everyone, however for a person armed with knowledge of it's quirks (and the above pitfall dealing with pitman arms), they will do damn near anything one could possibly ever want it to, and more.
Hopefully at the least it'll give you a chance to make a more informed decision on which way to go with it on yours since you already seem to be familiar with solid axle setups.