I've been eyeballing that radio since it showed up on tower last year... I'd much prefer it over the spectrum/losi derivative... Pretty much only due to the screen the MX has.
I mentioned that at my LHS last weekend and my LHS guy (one I actually listen to for advise) said I could buy it, but airtronics has been not doing so well. HobbyPeople is their primary distributer now. So support for it may become expensive soon (as it kind of is already with $90 receivers which I need a total of 3).
I have the MX3 FM and I really like how the screen tells you so much all the time. Most other medium grade radios only tell you one thing at a time and you have to scroll through menus to see stuff. The airtronics one shows 5 things all the time, t/b trim, steer trim, battery fuel tank, model number and one selectable in the center. Which really made me like the MX-3 FHSS.
Just food for thought...
Now that Spectrum has a nice pistol grip radio out (DX3R), I may save my nickles/dimes and get it. It's pricey too, but it's nice and has a screen that says a bunch of stuff like I like. And, if you buy a extra receiver (@$100), you get a 3rd for free.
Considering my needs, I would probably end up with the DX3R, $300+$100 for the radio/receiver and two more receivers. Vs the MX-3FHSS, $180 + $80 + $80 for the radio+2 extra receivers. Sure, it's $40 cheaper still, but it's newer tech and a newer designed radio that feels really good in your hand and is considerably lighter due to using 4 cells vs 8. It also has a few more features that the MX doesn't have.
For your needs, the MX3FHSS may fit the bill. Just helping you make your decision.