It depends on the unit. The one I work in provides excellent experience for and has sent a lot of nurses to CRNA school. When you interview, make sure you ask details on the acuity of the patients, such as the frequency pressors are used, arterial lines, ventilators, etc. Regarding CRNA schools, make sure that you contact the schools you are interested in attending to check if BICU is acceptable experience. Good luck! Burn nursing is intense but very rewarding.