I've always preferred apparmor. SELinux has always seemed radically more complex for very little benefit, unless you have a tightly constrained OS (like Android, where the VM does most of the work and every app has the same sort of security policy) or a team of admins working full time to maintain it (again, like Android).

Apparmor is weak in all the same ways SELinux is weak, at least in terms of the ways that actually matter - that is to say, a kernel exploit is the simplest way out of either. But anyone can write an apparmor profile for any program in an hour, and if you actually know wtf you're doing you can build very strong profiles and trivially test and maintain them.

SELinux is "good" in that if you are building a system like Android, great, consumers get very tight policies for free, and SELinux is ultimately more expressive. But I think 99% of companies looking at an LSM MAC should probably roll apparmor.