I just did the front brakes on my truck and flushed the fluid out as I installed Valvoline SynPowersynthetic. It's DOT 3 and DOT 4, and is compatible with conventional fluid.
Is it better? I don't know. But you don't want to save too much money on brake fluid.
I also got mine at Autozone, for about $5 a quart. If i remember correctly, it took two quarts to replace all the fluid.
Loren