I agree with fred and papermache. I also have the 1/5 scale Sig. It was the second plane kit I ever built. It's all laser cut parts except for the sticks, the fuse parts go together perfectly. If you have any building experience at all, or are just patient (or both), you shouldn't have any problems. Sig's instructions are very clear and thorough, lots of pictures, and the plan sheet is great, too. It will fly great on a .50-.60 size 4 stroke.. The parts on the older version were die-cut, and the 1/4 scale is mostly stick-built. This kit has a box structure for the lower portion of the fuse, with formers and stringers for the upper part, the wing is two-piece, for easier transport, and has a joiner tube. However, the struts are FUNCTIONAL and carry a significant portion of the wing loads in flight.

What fred says about not a first plane is true. I wouldn't say it's difficult to fly, it has characteristics not suitable to a novice pilot, but once you're flying a trainer well, you could make it a second plane. Not to say don't get it; get experience with a trainer while you're building the Cub. Here's some pics of mine; bear in mind that I modified it a bit, but the pics are still representative of how it looks: