Hello,

This is one of the things that has bugged me over the past few months and I have bought licences for everything.

ClientExec
ModernBill
WHMAP

Now out of thise three I keep coming back to ModernBill due to its functionality but I have to admit ModernBill interface is terrible and I do I like ClientExec just doesn't have all th features I would need and its interface is very nice and easy to understand.

I say this all comes back to your own personal preference.