I'd disagree with Jimmy W.
There are plenty of 35-45 year old ladies on FC. And all feeling like life's passed them by. This may be the sweet spot for FC gals, IMHO. Most who don't want more kids, who know themselves better with less drama in their lives, and they've established those habits, good or bad that they can be judged on, like us.
Besides, do you mind that most people will think you're holding hands with your granddaughter?
Unless one can commit to spending likely in excess of US$2000, there's no point of spending any time or money on a membership with FC.
To get the most from the FC experience (speaking to men seriously looking for a long-term partner), take a step by step approach. Draw up a list of must-haves and must-not-haves. Be aware of the dangers on any online site and multiply that by ten for foreign dating sites with foreign ladies.
I'm a young 69'er and chose not to respond to any girl under 30. Those 35-45 are more mature and self-aware. Not so many bad surprises.