Do a search on the 149 and you'll discover the problems some people are having with them.
A friend of mine had his rudder channel act up while flying yesterday and found the pins in the 149 receiver were loose causing the rudder to go crazy. The receiver is less than a year old.
I sold all my 149DP after reading all the problems, but Futaba isn't aware of any.
I have run several in my planes and have had no problems in the past, but I recently switched them out in fear of losing a plane.