I purchased this bra for a wedding since it had a low neck and back. It's definitely not the cutest bra, but it gets the job done. Order one cup size up!
While this bra will not provide lift like a underwire bra would (at least for my 34D chest), it does the job, so to speak. I will have to be careful not to let my chest fall out (e.g., if I lean over too far), but other than that, I think it's a worthwhile investment for the price for those occasions when you'd like to wear something lower-cut.
it definitely runs small. I measure at a 34 around the busy and the 36C is tight. I can wear it but I'm sure I'll be dying to take it off at the end of the night. Other than that it is well made, holds your chest well and the adjustable straps are perfect.