i'm in the middle of building it right now, and it's not especially hard. it's just that it's not as "ARFed" as other models. the directions do take quite a bit of creative deciphering here and there, but they're ok. a VERY sharp knife is a MUST, as is a triangle for aligning your surfaces. it's not really a one afternoon type plane, but it won't take forever. just remember foam safe glue, and make it as light as humanely possible!