I have been a member with MPMU Dev for several years and I guess, it is like anything that is a big part of your life. It is not until you lose it that you realise how much you miss it.
Having recently had a small problem with my renewal of MPMU Dev [my fault, not theirs], I very quickly discovered just how much I depend on their resources and invaluable support. Plugins that I constantly use, forums that I constantly read and just knowing that I have this 'safety net' below me when I work, have become such a vital part of my work.
So many sites and organisations claim that once you join, you will get this and have that, but in my honest opinion, it is rarely ever true.
MPMU Dev specialise in WordPress but so much of their content can also be applied in other design work as well.
If they do not change their system of support, resource repository and real encouragement to anyone who tinkers with design, programming and general 'web work', I cannot imagine ever letting my membership renewal lapsing again.
MPMU Dev is an exception to most. In a word, they are brilliant!