i have 2 bands sandwiching my e-ring (a princess cut with side tapered baquettes). i tried on matching bands, but liked the look of 2 different bands better - one is a princess cut channel set eternity band and the other is a plain white gold band with a twist. the twist nicely cradles the centre stone of my e-ring and offers a nice contrast to the stones in my other band and e-ring. my set seems more complete with a band on each side. drove me crazy before with just one.