We used the Intel compiler at my last job and also had some good speedups. But we also ran into a lot of bugs where it would generate non-working code at the hi

We used the Intel compiler at my last job and also had some good speedups. But we also ran into a lot of bugs where it would generate non-working code at the higher optimization levels. For us, the performance was worth the effort of working around the bugs. But that's probably not the case for most projects.