If you have a frame with a press fit shell you can run an adapter. After all my trials and tribulations with BB30, mainly creaking, I've come to the conclusion that not all bearings are manufactured to the perfect spec. I finally have a set of bearings that are silent with no locktite, the ones that came with my Kuota carbon cranks. As far as installation, ect, after awhile you get it down like anything else. I have no problems working on them now and whoever said they need much more regular maintenance is wrong. After you get them properly installed and silent you can ride thousands upon thousands of miles and not have to touch them.
If I had to choose one or the other I wouldn't choose press fit but it wouldn't be a deal breaker.