Personally, I f**king hated it. Nasty, crashy, etc. with horrible tech support. I'd not consider it easy to learn, but not the worst thing in the world either.
"Does it master well?" Just like anything else, it's only as good as the person using it.
"Better" is a loaded term. WaveLab was just ported to the Mac... I understand Samplitude will be at some point (which is going to kill a lot of competition). WaveEditor is rather well-featured, inexpensive, exports and imports DDP -- But "better" is still up to the guy at the controls. If Peak is running well on your system (and I'd imagine they must've fixed it by now) there isn't anything necessarily wrong with it...
I suppose if I had to choose a Mac program (I'm a Mac user, but my main system is Samplitude on a PC), it'd be WaveLab without any question. But that's me -