I like the simplicity of a Hamskea limb driven, I have a Trinity. I did NOT like the spring setup that came with mine, and have seen two failures, both where the spring broke. I have also seen the tension retainment bracket, the one with the oring, wear the activation cable badly.
I bought the rubber dampener and teardrop assembly for mine and just use a Blake's Hitch to hold activation cable tension. I very much like that setup over the spring, it has been problem free since doing so.
I think it is very important to take the time to mark up an arrow to time a limb driven rest. Hamskea recommends being between 70% to 50% arrow support, with 70% being more critical (target setup) and 50% being more forgiving (hunting setup). Devinhal has a great write up on how to do this on archerytalk, titled "how to time a limb driven rest", it may also be on the Hamskea site. Just involves making marks on an arrow so you know where best to tie off on the limb.
The only thing I don't like about it is the lack of a lock up feature. It is necessary to keep a finger on the arrow when stalking or a similar hunting scenario. Takes some getting used to after being used to a lock up QAD type cable driven rest. An arrow holder on the shelf of the bow helps, but really watch the height of them or you may have fletching contact. Most just put moleskin all over the shelf and side of the riser and keep a finger on the arrow.