The worst on the kits is that they have soft-venyl-tracks because these are very thick and soft...
I already built the StuG III and it`s not too bad, there`s some flash and typical errors with the surface-detailing.
The Kübelwagen and some (poor) figures are included.
All in all i`d suggest you to buy Revell kits if you really want good quality and little trouble while building the kit.
If the price is really a very big problem for you just try the Fujimi kits, as i wrote they are O.K.
I hope this helped!
Greetings, ekke