1) Reputation. Their online reviews seemed fairly solid. The resume writers I spoke to claimed there were some good people behind the company.
What gave me pause about ResumeServicePlus.com:
The price. It's way low based on industry standard and they are giving away way too many things for free. I'm all for getting a deal, but if at prices that low how can they afford to pay professional writers?
ResumeServicePlus.com has a slightly lower Better Business Bureau "B" rating. Additionally, they are not BBB accredited, which I consider to be a bare minimum for a resume service.
ResumeServicePlus.com also has a few glaring mistakes on their website - "Advices"? I didn't know you could make plural the word "advice".
I'll keep my eye on this company and if things shape up, I'll revise my review.
2) Age. ResumeServicePlus.com has been around a while, so you can trust that they are not going to fold up shop while working on your resume.
3) Products. ResumeSerivcePlus.com offers a bunch of things that make them unique.
They offer a free resume evaluation, which most sites don't offer anymore.
They offer hosting of a video resume, which I don't see any other site doing at the moment.
While the offerings are slim, ResumeServicePlus.com is taking steps to be innovative and to set themselves apart from the pack.
24 Hour Rush
If you'd like to view some of their work, ResumeServicePlus.com has a small library of Sample Resumes for your review.
4) Price. As discussed above, I feel as though their pricing is suspiciously low and to pay a professional writer I would expect to pay more. Also, their guarantee policy isn't clear. Perhaps, they can clear that up...
5) Industry Affiliations. ResumeServicePlus.com is also affiliated with the Professional Association of Resume Writers and the Association of Professional Resume Writers.