I decided to try Folk after seing friends posting about it on Linkedin ... and I have just been amazed by this product.
It's the perfect tool to centralize and organise ALL your contacts.
Before Folk I was frustrated because I networked a lot and met lot of great new people every week (I had 5K+ connections on LinKedin) but I couldn't "use" or track my relationships and connections properly, even at short term. Now I use my network in the most optimal way, both professionally and personally.
Thanks folk