I just purchased 11 pairs...well 10 pairs of regular 215 and 1 pair of 215 Special edition. The 10 pairs are for gifts for employees and the special editions are for me :P
I have to say the mighty little 215 is an outstanding value. It does not have the midrange (535 LTD, 846) or bass (in the case of the 846) of it's bigger siblings but it is incredibly hard to fault for the price. So much so that I bought them for others. I think folks would be hard pressed to find a better value for anywhere close to the price of these little gems.
One final note, I swapped the stock cable for both a copper litz and a silver litz cable running balanced into my AK240 and it scales up beautifully. Same is true when plugged into my HUGO. For folks running this out of a smartphone, know you can achieve more out of this IEM with better recordings, source/DAC and amplification. It is pretty jaw dropping to be honest how much this little IEM can scale up.
Anyway, these will be my running IEMs. I think the polite and fun signature works well for my intended use. I just hope my team will also appreciate them...I am fortunate to work with many music lovers.
Damn, I wish I worked with you...