I think, as with all things "it depends". There are certainly good jobs around. But the success of anyone person isn't assured. As with any field of physics, it will depend on how good your work is, how well you network (and how well your supervisor supports you), how flexible you are with moving into a new direction (are you a structure or nothing person, or could you do reactions? Can you do detector development, or are you more comfortable behind a desk?), it'll depend on your outside life - can you move anywhere in the world, or do you have a spouse/children/parents who mean that you need to stay in one spot? And so on, and so on.