I like this Miner, BUT 2 % devee is much too much. Claymore makes millions every month just with this little software. Is that fair? I'm willing to pay like 0.1 % but thats just greedy. I mine with the -nofee Option, its worth me instead of supporting greedy people.
I think worth every penny, because its very difficult to mine with a lot of GPUs using the best config for each one.
I have some cards that are the same model, brand, etc... but only works with different setup... and claymore provide this with cclock, mclock, etc.
If you have one rig, or a few cards, probably other miner software works too, but in my case, claymore help me achieve the best hashrate for each card.