Only just found this thread! I use the Trend lock jig. It paid for itself after just the second door I reckon. However I do have separate routers all set up for each function rather than changing depths and cutters etc.
What I like is the fact that you can't do a bad job with these jigs. Routing the shallow recess for the faceplate is perfect every time, no matter what the door timber is.
The deep rebate for the lock/latch body is also always prefectly square to the door, no chance of 'break out' or an out-of-square lock, causing stiffness and fouling with the handle spindle.
It is very well made too, it clamps very firmly to the door (essential) without doing any damage.