Annual raises do not keep up with inflation. If you are good, your workload will be very high (and you'll get great experience), but don't expect to get paid more for it. There are significant pay equity issues between assistant scientists and assistant professors, although they are supposed to be the same. The childcare situation in Baltimore is terrible, and the tuition at JHU's new childcare center is 40% of my take-home pay. No guaranteed protected time off for having a baby/adopting (even unpaid). Lab directors can give paid leave at their discretion, but this seems to vary widely.