The after set up is much better. I added some Tongan Branch to mix up the shapes more in my tank. I broke some TBS up by accident and it was very porous; I barely hit the rock and it cracked in half. I also got some very good looking shapes. I would have been very disappointed if all the LR I got from TBS was a round ball. I've noticed many pictures of TBS LR and the tanks look like they have basket ball down to baseball sized and shaped LR. I feel like I got lucky with the shapes of LR I got. One of the pieces looks like the Matterhorn at DL.
The biggest difference between the TBS and Tongan that I have noticed is that there is coraline algae all over the TBS and hardly nothing on the Tongan.
Nothing on my LR has died. It is really cool to watch but when you start getting corals, anemones, and other stuff the life on the TBS become boring.
As for the ease of an instant reef set up TBS is the fastest way that I have seen. I would order from them again as long as I can pick the shapes that I want.