You get a check on day one with taxes taken out already. The taxes taken out on mine was approximately 35% but I might have heard them mention something about first born or an extremity in lieu of the taxes.
They will mail out the 5,000 dollar check for the legacy aircraft. It has been a couple of weeks and I haven't seen it yet.
And, this is all based on a 2 year commitment. Anything less than a year is 100% returned and pro-rated after 1 year.