I've been using XMR-Stak with Miningpoolhub and so far it has been a very positive experience. Cryptonight algo doesn't stress my PC's as much as some others, cough cough neoscrypt =D
Systems: i-7 7700k - gtx1080ti, 2x gtx 1060
i-5 2500k - 2x gtx 670
i-7 4700k - gtx 770m
Avg. Hashrate: between 2.85-3.1Kh/s
Averaging 115-125 coins per day