This is second time I've ordered the Ernie Ball Hybrid Slinky. These are a good pair of strings, they have good sustain, sound crisp and bright. They seem to be pretty durable too since I tend to pick and strum aggressively and play for hours everyday. The first time I got these strings, they started showing rust and wear within a week! That could also be due to the highly humid climate and the fact that I don't keep my guitar in a case. When I ordered it for the second time, they haven't shown any signs of wear and tear yet and its been about a month or so. I also use the Dunlop Ultraglide String Conditioner as well to keep the strings in good condition. I do like these strings and will probably stick to buying them in the future too!