I've been with Polo for quite some time. Below are the fees. Seems ok to me.

Maker       Taker
0.15%   0.25%   < 600 BTC
0.14%   0.24%   ≥ 600 BTC
0.12%   0.22%   ≥ 1,200 BTC
0.10%   0.20%   ≥ 2,400 BTC
0.08%   0.16%   ≥ 6,000 BTC
0.05%   0.14%   ≥ 12,000 BTC
0.02%   0.12%   ≥ 18,000 BTC
0.00%   0.10%   ≥ 24,000 BTC
0.00%   0.08%   ≥ 60,000 BTC