Nationwide is primarily an insurance company. I don't have any direct experience with their 401k plans - but many people think you should be careful of extra fees and lesser quality products when using an insurance company for retirement plan services. "Bogleheads" is an online discussion forum that's mostly focused on Vanguard products. But users did have one discussion about Nationwide's 401k services that you can read here: http://www.bogleheads.org/forum/viewtopic.php?t=21321&mrr=1217524420