I agree with the previous poster that said it all depends on what you are looking for. I absolutely love the Unofficial Guide! However, I really like TourguideMike too.
While the UG's touring plans are designed to save you the most time waiting in line and are probably the best time-wise, TGM's plans have much less hopping around. He tends to stick to one area of the park at a time. For me, that works better. I don't like backtracking any more than necessary. But that's just how I am, lol.
If you want something specifically tailored to you, then the custom touring plans would be your best bet. That's what I'm planning to try next trip. I also think the cost is very reasonable.
I do think that TGM's plans may be better for someone with small children though, as he has plans specifically for parties with kids that incorporated all the things my kids enjoyed most.
I'm sure you can't go "wrong" no matter what you choose!