When Find My Past offered discounted subs for the 1911 earlier this year, together with access to all their other info, I decided to take up their offer. I already had a sub to Ancestry (which runs out in a couple of months time) and had decided not to renew that when renewal came around as my local library has the Library version of Ancestry.com. Library members are allowed half an hour free computer use per day, so I will just go there for things that are not available on FMP, eg the London Metropolitan Archives data, which I have used a lot lately. Perhaps a library near you would offer the same, though if it's not very handy/close by, that's no good!
There is an earlier thread about comparisons, started on 8th March - Census & Resource Discussion:- "Objective advice on search sites please" which might help.