You can choose your own speed, location (country) for each proxy in rotation with other proxies at same time! It's very simple to use - just put it into you browser / software whatever is running there. There are some minor bugs I had during my testing but that was resolved quickly by their team via chat/email so not really big issue. Highly recommend if this service fits your needs well enough, otherwise maybe try something else like Cloudflare PageRule etc or make custom solution using cloudfare API directly from server side code? We have been solving our CDN caching issues since we started working on internet traffic through it over 10 years ago now.