I think that's a good call. You'll get a lot more than you will from a course taught by most mainstream agency instructors. I'm not a GUE instructor, never will be (I solo dive, dive air up to 100 feet, dive sidemount in openwater), but the instruction I provide is heavily influenced by DIR, which is why I teach for an agency that allows me to add sensible performance requirements. I said most, as there are former DIR instructors who teach for agencies like NAUI and SDI (ones that allow adding things) or instructors who have trained with DIR agencies and add to the courses they teach.
Now I'll say this publicly (and hopefully not violate the terms of basic scuba discussion, anyone can talk to me via PM for this paragraph), but GUE is often maligned for a couple of reasons. One, there were some individuals in the past who would make comments that were ... shall we say controversial? They have not been around for years. Second, there is so much mediocrity in the mainstream agencies that there is a lot of resentment from those mediocre instructors for those who possess better skills. Third, the GUE system/philosophy is more rigid than mainstream agencies. But this is because they have the end always in mind: technical/cave diving. They don't dive air recreationally, as with nitrox, you always check your breathing gas, just as you would in a cave dive to 300 feet. Your practices do not change when you go from recreational to technical diving (but you do have more stuff). You just build upon it. They set up rigorous standards early on so that bad habits are not acquired and need to be broken as you advance in the diving you do. They do not target the segment of the market that just wants to float behind a DM and look at pretty fish (nothing wrong with that, btw).
In my area (Seattle), there all the GUE instructors are great: low key, very pleasant personalities, great divers, and thorough in their instruction.
