I have built one (F310B) and wasn't impressed by that at all. Although I like that they are 1/24. Oh well.
As for the Jordan, I've heard horror stories (Mika?) about the yellow plastic melting under paint - something that supposedly no all kits have been affected by and in most cases curable by using primer. So be careful with that, it seems that they have cocked up the plastic formula or something.
Alex wishing you good luck and waiting for a building writeup (from both of you as I also have a 1/24 Marlboro decal set for the F1-2000
)