Been a MES owner / user for a few years now and even though i have one of the older 800 watt
40" units and i did have to replace the terminals after a year ,IMHO it's a great unit for the cost and very easy to use.
As for the AMNS, I was happy w/ my MES and probably would have never purchased the AMNS. But since i was given one By another member (thanks Al) i decided to give it a try.
I have to say that it is a great addition to the MES. I use it along w/ my normal chip tray and it does what everyone said it would do.
Have used the AMNS alone to cold smoke cheese . Didn't come out to well ( melted)
But that was just because the ambiant temps were in the upper 90s that day and even w/ a bowl of ice the inside temps in the smoker were to high.
If i were in the market for another electric smoker ,I would buy another MES in a heartbeat.