You have to look at this from 2 different point of views:
1) You want something (900) if the environment is to problematic for 2.4GHz, otherwise your model is history. Little bit of delay is better than splinters and large fireball.
2) This is all based on software. If community (Us/Jeti/Danny/Wayne...) discovers better way you are only firmware update from better solution.
Zb/Jeti USA
This is another reason Jeti is ruling the roost.
Good job guys and gals!!
Now send me my DS-24 already!!!