The upcoming cuts got me thinking about how much of a success xlines has or hasn't been. Since it was introduced there have been the following changes.

X6 dropped from the brand.
X21 reduced back to half hourly from every 15 minutes to Durham.
X9 withdrawn.
X10 reduced to 2 hourly on Sundays.
X47 dropped from the brand.
X45/46 reduced from 4bph-3bph then x46 withdrawn. 
X30 extended to Consett then extension withdrawn.
X30/31 frequency reduced from every 15 minutes to half hourly.
X20 upgraded from minibus to full size singles.
X20 Sunday service introduced then withdrawn between Sunderland and Durham.
X72 introduced.

Bearing this in mind I am interested to hear as to whether people believe xlines has been a success or not and to what degree. This is intended as a debate not just a p*ssing contest. Feel free to let me know if I have missed any changes and I will amend the list.