Pros:
If a course gets a 4 or higher from me, it should be taken as an immediate "GO PLAY"
Sontag has almost everything you'd want in a disc golf course. You'll have a few open field shots, a few field to woods, a few woods to field and the majority are wooded, technical and long.
Don't expect to roll up in here and destroy this course, honestly I went into my first round here with survival in mind. I had been thoroughly warned that this course is a beast. It didn't disappoint. It will test your precision on nearly every hole. Apart from holes 1 and 18 (see cons below), I have very few complaints with the hole layouts.
In typical Hoeppner fashion, the course is two 9-hole loops, the only way any 18 hole course should be. This allows for tournaments and events like doubles to run a little smoother.
Placements shots are the name of the game here. You'll need to be accurate off the tee pad or you'll suffer from it. Even on the open/semi-open holes, your drive placement greatly determines if you have a reasonable shot at getting up-and-down. A bomb drive may look impressive, but if you're off the fairway just slightly, your score will suffer.
Challenge. You won't walk away from Sontag with a good score if you weren't on your game. You'll need to throw mostly technical driver shots, up, down, left and right. To add to the variety, you'll even need to throw technical putters and mids off the tee on several holes. Even the par 4's and 5's sometimes lend themselves to mids/putters off the tee as placement is more important than distance.
There are plenty of benches on the course (what appeared to be 90% of holes, including some at the blue tees). You'll need them.
Despite being natural/gravel, the tee pads were VERY big in most cases. Even those guys that Happy Gilmore from off the tee pad should be able to start on the pad on most holes. The only exception to that was hole 6 I believe, which didn't need a huge run-up but was half-occupied by a root structure.
Cons:
To get things started, hole 1 is a little lackluster. A wide open field, flat, into the a small wooded alcove. Basically you have to throw it straight and hope it pokes through the first tree line.
Since we're talking about individual holes, hole 18 also left a lot to be desired. To be worked out the way I was through 17 holes, I expected something epic for the finality. I was pretty disappointed with a wide open mid range shot.
There were a few navigational stumbling blocks. If I hadn't been playing with someone who had played the course before, I'd probably wandered around a little between a few holes. A course this nice shouldn't suffer from little detriments such as this. Hopefully some locals will take this issue on.
Natural tee pads/Gravel tee pads are a big pet peeve of mine. I don't think I could give a course any higher than a 4.5 with either of these tee's. They don't allow for good form on the tee and also up the chance of injury quite a bit.
There is technically water in play, but it really isn't in play for anyone over Intermediate level. It's a dog leg left as is, the only way you end up in the water is if you throw the wrong disc. Only inexperienced players will worry about the water hole. It would've been cool to see more of the lake used in the shot.
I was hoping for a little more variety on the open shots. There wasn't any in-between from wide open to densely wooded either. It was all or nothing, but mostly all (the trees!). Only 3 holes could be considered "open" and hole 18 is a honestly an embarrassing finish for such a fantastic course.
Other Thoughts:
You'd have to be a masochist to subject yourself to the blue tees, I'd imagine. It's probably fun once or twice, but even the top pro might come out of the woods hating themselves. I'd be interested to see what the course records are from each tee.
I wouldn't recommend this course to the rec players of the DG world. Intermediate players should know what they're getting into and might want to play red tees first. If you're Advanced or higher, this course will test your game and is a blast if you play well (I was lucky enough to shoot -2 from white) but I'm sure it could be demoralizing if you're not on.