This is a tricky question and therefore difficult to answer as so much depends on individual circumstances!
For example: Gregor and Elaine qualified in 2007 on a Level 3 Diploma. Gregor started a private practice straight away, seeing a minimum of 6 clients every day for 3 days per week and 1 day per week, he works for a palliative care charity giving a peripatetic reflexology service in a 20 mile radius. 1 day per month has been dedicated to furthering his knowledge in reflexology and he regularly studies new research into all CAM's. Elaine on the other hand, treats her friends and family on an informal basis and has attended two, one day CPD courses. One of these Practitioners may really benefit from learning at Level 5, whilst the other may justifiably feel that they have continued their learning, long after qualifying, with little to be gained from studying at Level 5!