Don't have a paid subscription but got on late yesterday evening with no problems.
I'd made a guess that the changes were to do with making the WW1 sets available for free and got onto those too, including images, with no problem other than I can't find any one that I thought might be there.
The service records are clearly not complete in that some people come up on the pensions records who clearly have no service records and there seem to be medal rolls for many more people who are unidentifiable without further information (e.g. to link service number to age/DOB or occupation).
Disappointed as I've yet to extract any new information from what is available.