Before the days of Microsoft word, Laser jet printers, and home publishing...I think professional resume services had lot of value.
In this modern age, I am not so sure. Almost ALL major airlines have online applications or pre-printed applications that are screened by computers. If your target is a major, the money spent on a fancy resume might be better spent on more training, etc. I say this for 2 reason. First, you can now create an attractive resume on your home computer that is just as pleasing to the eye as one that has been professionally typeset. Second, I don't think paper resumes are nearly as important as airlines lean so much now computers instead.
If you are trying to get that first corporate job, however, the rules may change. I will say, however, for most airlines the Resume is simply a glorified business card your interviewers can review. JetBlue and SWA are going to ask THEIR questions anyway, not necessarily anything based on your resume. Fedex likewise screens via computer, then your first event at your interview is a simulator eval. Nobody checks a resume at any point later in the process, either. However...if someone is handwalking your package in perhaps a nice resume is a plus. I know my Delta buddies (back in the 60 a month forever day!....weren't those the days?) didn't want my resume....all they wanted was my social to give to Plato II to call you up from UPAS.
Bottom line--a good resume is nice, but it seems your computer app is where the action happens. However...I invite anyone with other opinions or info on other airlines to correct me or add your 2 cents!
Fly safe.