As the (now former) owner of a 22" dual-zone propane-fired Blackstone, I have really enjoyed the Blackstone.  We full-time in a motorcoach with no other propane on board.  The only negatives we had were the weight, and the affects of wind on keeping an even temperature.  We decided to move to the new E-Series 22" dual-zone, and we LOVE it!  Lighter weight, not affected by wind, and the cooking surface is amazing.  Clean up is a breeze!  What a great new addition to our mobile lifestyle.