I don't have an Iside but I've had a couple of FAIR over and under's and have handled a bunch more, in general I think the FAIR product is good. In fact, in my opinion they make a really good gun for the money, the metal work is well done, the bluing is really nice and the wood to metal finish is above average. The durability of the guns seem to be pretty good but in fairness I've only put about 10,000 rounds through the one that I still have. The only place I'd fault them is in the wood finish, the wood is very good and the finish is fine but the wood grain is not filled and the ones I've owned were 18 LPI checkering, probably because the course surface won't lend itself to anything much finer than maybe 20 or 22 LPI. That's a pretty small beef on my part but it does set them apart from more expensive guns in that filling wood requires more labor and the more expensive brands charge for it in a big way, it's one of the few things that cannot be done on a machine these days and is still old world craftsmanship. Based on my experiences with the FAIR over and under's, I'd not hesitate to recommend one of their side by sides.