Sig is the ONLY company I know of that really develops their models. A lot of other manufacturers design a model, build one, it flies, they sell it. Obviously I don't know that for a fact since I don't work there, but looking at their models it seems really apparent that they didn't spend much time developing the model because if they built more than one, they'd have changed some things.

Anyway, Sig kits are very good. If you want to be a builder, then you can't go wrong with them. But if you don't want to build and just want to get in the air fast, then Sigs newer kits and kits from some other companies are pretty much on par with each other when it comes to skill and time required.

If you want to advance your building skills then you'll need to move beyond laser-cut lite-ply fuselage sides that are simple jigsaw puzzles because they are always heavier than kits that are designed for higher strength to weight, but also require more skill to build.