We are there that week and also doing the MK one on 4/11. Also doing the DHS one on April 6th...Depends when you go and the hours. I'm doing DAH on April 11th and the park closes at 10pm that day so DAH is until 1am however you get in at 7pm so I will get 6 hrs in the park. I will say that it is kind of expensive but since it will just me I didn't mind and I also used my AP discount so it was only $95 instead of $125.
Here's my personal opinion on these...I think it's a great way to compliment a trip so that one is not stressing over doing rides during the day and jamming that in...Disney is much more than just the rides but it is hard to have that mentality when one has to have a strategy akin to solving a Geometry puzzle using the Pythagorean theorem.
I look at it in that it allows me and my family to have more down time and flexibility during our trip knowing that we can hit all the major headliners at these parks without sacrificing tons of time or ability to enjoy all the other things Disney has to offer and still be able to make it into a "vacation".
It comes at a cost...sure...but we are at lifestage where we will gladly spend on things like this than say on character breakfasts and meals or things like that...