I would like to thank this forum and all the members for their great help. This is an excellent forum. I got my ILR approved with one dependent (my wife) yesterday at Croydon PEO.
Documents provided:
cover letter, Bank statements, payslips, Life in UK test results for me and my wife, initial HSMP approval letter, Tier1 extension approval of my wife and myself, cohabition proof (utility bills, council tax bills, marriage certificate), absences proof (letters from employer for work-related stuff and personal letters for personal holidays). Forgot to give them all the photocopies. They did not ask me to give these.
I had 313 absences (mostly work-related but none above 180 days in one year), so I provided employer letters as the proof. My experience has been pretty smooth. Appointment at 08-50AM. Got there at 08-20AM. Got through the security checks and paid the fee. Then one fine lady asked me to provide the documents, she glanced at them and complemented by saying 'nicely organised'

Let me know if you need any help.
Cheers,
Ali