I am putting a Speed Air 40 together at present and it is going together very well.
2 problems I have identified though.
The 1st is the supplied wheels were "square" and also in my opinion, a tad too small for the rough grass fields I fly off.
That is easily fixed though. I will fit a 2 and a 1/2 inch wheel to the noze and maybe 2 and 3/4 inch units to the mains.
I know I have some of each size somewhere in one of my R.C storage draws.
And BH are not the only ARF manufacturer to supply wheels that are either too small or square.

Also, (and more of a concern) the nosewheel mounting block is only held on by 4 wood screws.
A couple of not so graceful landings and it can be pretty well guaranteed that the screws will tear out of the ply firewall.
So I will remove the screws, drill out the holes and fit blind nuts. Then will substitute cap screws to hold the block in.
Other than that and for the price paid, it is very good value for money.