I just ordered this bra and Moving Comfort's Fiona bra, and this one offers more better support for larger cup sizes.  It runs true to size (my 32D fit perfectly), is comfortable, and offers great support.

I wore this for the first time while doing a high-intensity plyometric workout, and it kept me in place, with only slight bounce.  My Lululemon Ta Ta Tamer offers a bit less bounce, but the price of the Juno bra is much better and there is only slight difference between the bounce factor I get between the two bras.

What I especially love about both bras is that not only do they have the adjustable back closures (hooks just like a regular bra), but the front straps are also adjustable with velcro.

The only downside is that this does give a slight "uniboob" effect.  It does have separate cups, but, since it's such a heavy duty bra, you don't get quite as much separation.  I also noticed that bra hits at a weird spot around my armpits, which gives me a bit of that smooshed "bra fat look" near my upper arms.

Overall, though, this is a great bra, and I'm going to pick up a few more!

UPDATE on 7/13/11:  I recently saw this bra featured in an article in _Health_ magazine about best sports bras; the Juno was listed as one of the best bras for D-cups who need high-impact support.  I've been loving this bra so much that I recently ordered a second one.