i haven't heard of anyone complaining about installing D14, so i guess it isn't that hard.
the only thing is that you'll have to install it last to make sure everything else is already attached.
about the ram clearance, D14 has a good one, so long as you don't use ridiculously tall ram-sinks though.

edit: i wonder why they don't revamp the way ram is mounted, going with how sodimm mounts should mitigate any clearance issue for example.