unless there have been some changes made that are not posted. I guess i am on my last MES. I have the MES 40 w/ the 850 element and the recovery time is awful . i cant see how dropping to a 650 watt can be any good at all. sounds to me like they are pulling at straws trying to solve problems and are going to end up making more problems. The 850 watt has a very hard time getting over 250 degrees cooking temp. So i can't see how a 650 will be any better.
If there is no top exhaust vent then that is another strike against the unit. The MES puts out a lot of steam and it needs to have somewhere to escape.
This will also affect the use of the AMNS and
AMNPS as you will have trouble getting enough air to keep them lit.
like i said , If what is shown and posted is all there is , MES may have screwed the pooch on this one.