Speaking form personal experience, and strictly about the Honey Bee 2, I won't recommend it to a complete beginner (I can fly helis on sim pretty well but still can't fly this thing for squat). Others may disagree, but this is my personal opinion from my epxerience. The fit and finish leave much to be desired although parts availability seem to be pretty good.

While the Rx in the 4 in 1 board is 6 channels, the Tx as far as I can tell is only 4 (there's a 3D switch to change the throttle curve to enable inverted flight).

There is as far as I know, no direct fit (meaning it was intentionally designed strictly for the HB2) upgrades. Everything that is listed as an upgrade for this heli are usually generic ones that can be made to fit on most micro helis. I recently purchased an alum. CNC swashplate (since the stock swash separates easily) for a Hummingbird but found that the stock Anti-Rotation arm will not fit it so I will need to fabricate or buy a new one now.

My 2 pence. Good luck and welcome to the hobby! =)