thinking of buying it but wanted to know how the airtronics "2.4 ghz system" was before buying it....
pros and cons of this radio?

The m11 is sweet radio, feels good in hand(better then helios IMO) It has a very intuitive menu, use Chad Bradleys m11 tips to help get it dialed in a few areas, as for the Sanwa DSM module, I have no clue, but I do know that Futaba's Faast system is supposedly a lot faster then the spektrum systems, which is what I have, It was the first dsm I have used, and I am still amazed at the response time as opposed to the older radios Im familiar with, like 20 yrs old that is LOL gl with your new purchase Ryan