Which freelance platform is the best for getting new clients?

Patriot

Have you used any of the online freelance platforms like Fiverr, Upwork or Freelancer? Which is the best for getting clients? Discuss your experiences and thoughts on these platforms here. What do you like about these platforms and what don't you like?

PixelPioneer

I've had ok luck on Fiverr but it's not consistent. It's good for quick jobs like image adjustment where I can make $5 or $10 for small image changes, but harder to get the big jobs because oversees freelancers undercut me based on price. Fiverr at times seems like a race to the bottom and everyone is just competing on price, not quality.