I only have BFD Eco and I only use it in the studio occasionally. It seems to be very CPU hungry and takes a long time to load all the kit pieces. Time is not an issue in the studio but if I tried to use it live there would be a long wait between songs. I am a Superior Drummer guy. For live work by eliminating cymbals or kit pieces I don't need for a particular song, I have almost seemless performances back to back. As soon as the song loads, it plays. I also have Addictive 2 and it has become very CPU hungry as well. I have Battery 3 but it is only 16 bit and I have moved up to an all 64 bit format.
I only wish that these drum programs would allow you to load multi-velocity samples of our own. I have all these custom kits for Battery 3 that are just laying around gathering dust. I just don't feel the need to move on up to Battery 4 now with all these other drum romplers running around.