Kit instructions are important when building your first kit. Where one might simply say "attach wing to fuselage" another might give 4 pages of step by step detailed sequence with photos. In general, SIG and Balsa USA instructions are pretty detailed, Top Flite/Great Planes are very good too. Someone else mentioned you can study the Top Flite Instruction manuals in PDF format before you buy so do take a look at their website to see what your getting into. Good luck.