Some people claim the BBE will make a tube amp sound "too digital" but it's all in your settings. I had one, and I just sold it. I use a Hughes and
Kettner Switchblade head a Fractal Audio Axe-FX Ultra so the BBE at that point was a bit too harsh so I got rid of it. In my studio setup though, I still have a BBE 482 rack because once and a while it's necessary to brighten up a track.
I used to play a Madison Divinity head and the
BBE Sonic Stomp added a little more life to the head. It just depends on your application.