You normally see a correlation between developer effort and DDoS robustness and fees.
At 0% - You’ll get the standard github interface and should always have backup pools configured.
At 1% - You should have a nice interface with medium levels of redundancy.
At 2% - You’ll want a nice interface like xhash.net or verters.com and expect good robust protection against attacks and good server redundancy.
In a rare occurrence, you’ll get the service of a 2% pool and the charges of a 1% pool, in those cases I always donate 1%…