Hi Johhny
I currently do all my banking online with AIB, I also tried Ulsterbank online - Terrible, NIB online - barely ok, and now finally PTSB.
The PTSB website is very good, easy to navigate and layout is good. I am not yet sure if it is as good as AIB, but this may just be down to familiarity.
The logging on screen is very handy + your user number is printed on your cashcard, so one less number to memorise! then using a password and a 6 digit code it is secure.
hope this helps
seasons greetings