I have been using tactile transducers for over 10 years.
I started out with an array of 8 RBH FX-80's. (ultra high performance Aura units)
I used these for about a year and replaced the array with a pair of Clark Synthesis TST 329 Gold models and then stepped up to their TST 429 Platinums. I used these for about a year as well.
For a brief period I installed four Crowsen Tech TES-100's when they were released.
When I moved on to the Original ButtKickers I started driving each pair with Carvin DCM-1000 amps bridged mono. This was before the release of the BK amplifier.
I couldn't handle the fan noise so I picked up a pair of convection cooled Crown K2's and have been using them to drive my BK's ever since.
At one point I have driven a single Buttkicker with a bridged K2 (2500 W bridged mono into 4 ohms) and they always stayed cool to the touch. I have never had one bottom out. I have also used subharmonic synthesizers on their signal.
The original ButtKickers outperform all the models I have used in the past and I have never had a problem with any unit.
I used the BK's in conjunction with a pair of Velodyne HGS18's. I now use a pair of Epik Conquests in my theater with the BK's.
I don't have experience with the ButtKicker LFE yet. I have had one for over six months and haven't hooked it up. I have some Berkline theater recliners on the way and will be testing it inside one with the BK conversion kit.
Original BK sitting next to the BK LFE.