For the past two months I've been using FamilySearch to flesh out my tree, then manually trasferring the records to Wikitree. It has worked fine up to a point, but on most lines progress had slowed to a crawl.
I decided to try out the 14 day free offer at FindMyPast since they profess to be the best at UK records. And the verdict is:
Great site! I'm fairly unimpressed with their presentation, and have yet to detect the presence of anyone else's tree merging with my GEDCOM upload, but the hinting system is brilliant. In every line - except those known to be major brick walls due to lack of facts - I have managed to extend by at least two generations with almost no effort.
When I check FamilySearch again, the records are often there but very hard to find. So the big plus with FindMyPast is that their hinting system works extremely well, without overwhelming the user with inapplicable records.
I give them a solid recommendation if you need to research UK records, particularly those from the 1700's and earlier where it starts to get harder. They also have adequate coverage of Australian records, although I beat those to death by searching BDM records weeks ago.
I won't be subscribing with them immediately, but when the LivingDNA test results arrive in a couple of months it would be a good time to upload my results to them and search for matches. Meanwhile I'm online every waking moment, expanding my Wikitree family with the data provided.