I use Clearview a lot. It is cheap and good.
No, it doesn't have all of the bells and whistles of Reflex, but for $30 (with free lifetime upgrades no less) what do you expect
There are a lot of models (100+) for it - free
You can import and use any FMS model you want.
It is easy to tweak the params to make the heli / airplane perform exactly like you want it to.
Stefan (the author) is a great guy, and VERY helpful. I have had quite a few startup problems (almost all my fault [:@]) and he has been very patient with me, and helped me a lot.
Go get it - you won't regret it.
And no, I am not related or affiliated in any way - just a happy customer.