Cons:
Grass tee areas; tee areas that are sometimes hard to find; no true technical holes; a few quasi-dangerous tee areas (like the 7th); some very dense brush just off the fairways can make finding your disc a painful ordeal; you may shoot at the wrong basket without a map the first time you play
Other Thoughts:
Baker farm completely surprised me. Looking at the pictures, it looks way too wide open to be a course I would even start to consider excellent. The pictures simply don't do it justice - much of this due to the course's length. The obstacles are there. Yes, the course is relatively open at first glance, but if you let your drive go nose up off any given tee and it veers hyzer, you can safely bet it will end up in trouble. I made the comment to my friend by about the fifth hole - "It's like they designed this course on a computer! How did they create this layout?" You simply can't get a feel for these holes by looking at the pictures. I took a picture of one of the baskets, the 12th I believe, that may give a bit more of a feel for what this course is like than the shots from the tee. I'll put it up sooner than later.
If this course had concrete tees and better signage, I'd have to consider giving it a 4.5 - near perfection. I still may not be able to go that high, however, as the truly technical holes just aren't there. Am I asking for too much? I don't think so... I look at the word 'perfect' for a 5.0 and that's what I'm going off of. Baker Farm doesn't have every little thing required to be a 4.5 or a 5.0, but this course doesn't have any glaring flaws. This course is Excellent - 4.0. Can't for my next trip to Rochester so I can play it and Ellison again.
EDITS: timg has informed me that I did indeed miss the practice basket, so I've removed it from the cons. Word is there will be concrete tee pads installed within the next couple of years - when that happens I may come back and bump this to a 4.5 after playing again...