I think for £7-50 you can't go wrong, You only need to pay that if you want to get in touch with someone or post on their message boards, to search the for names is free.
With over 25 million names on the site and over 112,000 added within the last 24 hours you do have a good chance of a match.
Maybe I'm just lucky

but i made contact with a researcher who took a small part of my tree back to the 1500'S (with sources) on my first day.
I have made contact with over 20 people researching my tree and several of them have put me in touch with others researching my tree.
But i have had a least half a dozen definite relatives not respond to my messages

but i have not let that colour my feelings toward the site.
My subscription is up tomorrow and i will definitely be renewing.
I do find though that there any many people on the site who only have themselves in their tree or just a handful of people, for best results you need to put most or all of your tree on there.
Steve.