Experience with Cloudflare?

I've been working with a client who has a large e-commerce website and we have a number of performance issues that a CDN could resolve for us.

I've been researching CDN's for the past week or so and I think Fastly & Cloudflare are the two contenders I'm considering. The client also lacks a large budget, so I'm taking Cloudlfare's $20 subscription as a probable solution for this case.

Has anyone else had experience with CDNs and/or Cloudflare specifically? If you have, can you share your experience and maybe provide some guidance? Any tips are appreciated 🙂