I've used Shotcut for a 5-min film montage, about 10 h of work (with a part in learning to use the tool and some in cleaning/hiding noise I've made while filming (don't drink and film!)). During that time I've had a handful of crashes, which were horribly annoying as they were totally random and without any kind of recovery possibilities. For the rest it worked great and I didn't had any difficulty, except for choosing the rendering options: there are too many of them and I'm not a video specialist, here a handful of default (native, web, mobile…) would have been good, like other video editor have (I think Windows Movie Maker has them, for example).