IB credits can be VERY useful. At many colleges, students who enter with enough of them may be allowed to “accelerate” and graduate early (a big money saver!). IB credits may also allow students to skip introductory classes. (But be wary. Some students find these intro classes boring, yet others who have jumped ahead … especially in technical fields like engineering … have later complained that they weren’t adequately prepared by their IB program.)
Note, however, that colleges … even similar seeming ones … may have markedly different policies when it comes to IB credits. Not only will these policies vary from college to college but sometimes even from department to department within the same institution. So you have to read Web sites carefully to see what exam scores you need in order to earn ANY credit and also to find out exactly how this credit can be applied. Note also that these policies might even vary from year to year, so don’t rely on the grapevine for information.