Well, what can I say?
Whether you find the jigs easy or difficult to make will depend on your level of skill and the tools you have available. Some, like the Ultimate Tablesaw Tenon Jig, are more complex, even though they use only the same basic techniques. It's a bigger project, but not intrinsically more difficult. Other jigs, like my cross-mortice jig or the track setting gauge, are very simple and just require you to drill holes and glue bits of MDF together. I can't tell you whether or not you will find them easy, but they are all straightforward, and of course, you can start with the simple ones and move onto the more complex later.
Many of my jigs use the same techniques time and again - embedded nuts, diamond keyways, etc - so even if you make a bit of a mess with the first one, the second will be better. You will be building your skills just by making them. And because they are made mainly from scrap, the financial cost, even if you do cock up, is small. Just have another go. They all work as advertised and I've used all of them myself for many years. The only ones I no longer use are a couple of the earlier tenon jigs because the UTTJ and the UBTJ have superseded them, but they are still excellent solutions if you have only a router. If you have specific problems, you can always give me a call and I'll try to help out.
I also offer a no-quibble money-back guarantee, so what have you got to lose? In 5 years of trading no-one has taken me up on it, so I think that's a pretty good track record.
Cheers
Steve