My hunting is limited strictly to weekends and what vacation I can afford to take. I don't get home from work till after dark. I try to make the most of what time I do have, but there are things that need done around here and I cant just sit in the woods during all my free time. Sometimes i have to choose weather I want to sit in the morning and do chores later, or get the stuff done and get out afterwards.
To some extent, I'm partial to a morning hunt. I have sets that are in place on field edges for the evenings that typically don't do well in the morning, but I have a few places that I can set up the climber and catch them on their way back to bed. Sneaking in is tough if you haven't taken the time to clear a trail, and mark it, as I found out yesterday. watching the woods wake up is cool, and having daylight to track by and field dress is definately a plus. I killed my first deer at 9:00 am.
I guess my biggest thing with a PM sit is that feeling that as you climb down, there are eyes on you. The deer are getting up and about, and are probably watching you. That spot is now compromised in my opinion. But thats the beauty of a climber, you can always move thirty yards down the trail next time.