I've seen quite a few 'flame effect' candle brands coming out in the last few years, and some are nice, some are not. Some I feel (for the cost difference especially) are 'good enough'.
I like the Candle Impression Mirage candles, actually better than most of what Luminara is putting out right now. The battery life is better, the flame effect isn't done by an over actice dancing flame, but a more muted flicker, and the timer is totally programmable...I get to choose the number of hours I want it on.
There are a lot of things I take into account when looking at a candle. Price is not the most important. Style, good coloring, size (not a fan of the 3 inch diameter, like them bigger), embellishments (scrolls, primitive dusting, or some other type of treatments) all factor into what I think is a good value.
I personally feel the Luminara, because the wick itself moves, is much more fragile than the Mirage, which is stationary. The Luminara's will vary in that some move too much and are rather manic, and others don't move at all.
I like Luminaras, but there are others coming out with the 'look' and some other nicer features. I choose based on quite a few criteria, not just brand name or price.