I'm at Penn State World Campus, entering my final term for a 33-credit masters degree. PSU has a great platform and I would definitely recommend it.
As 2bnoir says, make sure you stick with a well-known university. I'm partial to PSU, but Northwestern, Texas A&M and several other schools also seem to also have great programs. The downside is that these "well-known" schools are not inexpensive, though they will work with you on financial aid, student loans, etc. Again, If you're going to spend the time and money to earn a degree, MAKE SURE it is from a credible school.
In my experience as hiring manager AND an employee, there is little difference in credential value between most online degrees and in-person degrees, provided they are from the same school (i.e. MA from Penn State World Campus vs. MA from Penn State), or caliber of schools (i.e. Penn State World Campus vs. Northwestern University School of Continuing Studies). This is not the case between, say, Penn State and Walden.