I just came back from my first trip to see Sedge Valley and I loved the place. It felt so wonderful and intimate... The holes were wonderfully imaginative fun and exactly what the resort needed. I would be shocked if it wasn't the resounding favorite course at the resort (excluding Lido, but maybe even including it because I think people are going to be much more divided in their feelings on Lido)...
Kudos to Tom and the Renaissance team for building something extremely special.
I just got back from 4 days at Sand Valley. I played the four main courses but was too tired to play the Sandbox after walking 36 a day. (I'm in my 70's). I should probably gather my thoughts before posting anything, but can't wait, so here are a few preliminary things:
1. I agree with everything I quoted from Stephen D above.
2. Re: the earlier discussion about uphill holes - I have no idea what the overall uphill and downhill numbers are, but the stats posted above trying to quantify the hilliness are not necessary. There are a bunch of uphill shots to be played (3, 4,6,12,14,16, and 18, as well as some slightly uphill par 3's (7,8), perhaps depending on which tees one plays from.
3. 3,6,12 and 18 were among my favorite holes.
4. For me, the greens played very different than at the Lido. The greens on Lido were extremely difficult for me to hold or get close to the majority of pins, Whereas, many of the greens on Sedge had backboards or sideboards that you could use to get the ball close to the hole.
5. Re: pace of play - The tee sheet was full. We played in about 4 hrs 15 minutes. Never saw the group behind us, but were in constant site the group ahead of us, but only had to wait on them a few times.
6. Loved the par 3's
7. Didn't really remind me of an English heath except when I let mind view the holes with the wild grasses and dark flora as mimicking heather, but I never hit a ball into that stuff at Sedge but fairly often visit the heather in England. #7 did sort of remind me of a par 3 at St Georges Hill.
8. Difficult decision deciding whether to play Sedge twice or Lido twice. Sedge because it was so much fun or Lido to see if I might have learned some things that would prevent me from getting beaten up so badly.
9. Take a day to play Lawsonia Links. Worth the 90 minute drive from Sand Valley at less than half the green fee
Link to Sedge Valley Photos:
https://www.flickr.com/photos/golfcoursepix/albums/72177720320337655/Photos of favorite uphill holes:

Sedge Valley #3 blind uphill approach to green behind bunker left 
Sedge Valley #6 uphill pitch to green 
Sedge Valley #12 short uphill par 4 
Sedge Valley #18