Well, I personally believe that denominations are ungodly in their nature (in what they have become), although I think that they were started with the best of intentions. People saw something wrong in the church group they were in, so they set out to do it right. Hence, another denomination. Although, these "good intentions" are exactly what Paul urged us not to embrace. By labeling ourselves, we inadvertently promote division and schisms usually arive from no intention of our own.
Do I think that people who belong to a denomination are not saved or that the church is illigitimate? NO NO NO. I just think that ideally, we would all just be Christians. BTW, I'm interdenominational... meaning that as long as you except the basics: the Father, Son, and Holy Spirit, salvation by grace through faith alone, and other basics, you're okay with me.
We fellowship with denominations and everything. To us, they're Christians. We just disbelieve some of their denomational distinctions... But, those are usually generalities anyway. Surely, you'll find a baptist who believes in the baptism of the Holy Spirit as evidenced by speaking in tongues. And you're sure to find a Pentecostal who has heard of grace. No offense intended... It's just that sometimes, these denominational distinctions arise. But, those are just names... As long as we love the Lord and strive to be like Him, Christian should be the only name we need. But, in the meantime, to each his own. I love everybody and think that the Lord does too.