Ive been through a few different leaf pack sets:
Wheelers AAL - rough ride, only gave height, moved through the suspension too quickly with the stock leaf pack and the axle wrap was horrible
Dakar HD"s - Didnt last 2 years until they lost most of their progressive rate and flattened out. SUPER Squeaky, couldn't fix no matter how many bottles of lube or cleaning, gave decent lift but again they didnt last long.
(CURRENT) - Deaver U402 Stage 3, this is my current leaf pack and its by far the best. The ride quality is so much smoother than the previous AAL and Dakar even though they are heavier weighted. No axle wrap yet and extremely little chatter during wash-board dirt roads.
If you can afford the deavers they are your best option. AAL's in my opinion are temporary solutions until something better.