After getting some serious chafing last year from poor sports bras, I began my quest for the perfect running bra.  I am 5'5 and about 125 and wear a 34C or 36C, so am of average size.  However I am  pregnant again and need some extra support and something that will hold up running while pregnant then breastfeeding.  Last year I found the moving comfort Vixen bra (I was nursing twins then) and found that it held me firmly in place on long runs of up to 14 miles, comfortably and without chafing.  I found it annoyingly difficult to put on and take off. However it gave me nice shape.  It was good, but not perfect. I am now 6 months pregnant and felt that it was too snug (it's a size Small) so I had to find something new.  Upon reading the reviews I decided on the Moving Comfort Juno and the Fiona.  I got them in a 36C as I am getting fuller in the chest and need something to hold them in place & grow with me.  Upon trying them on I felt very secure in the Juno, but not particularly comfortable or confident, I really felt like I had a lot of back fat, and since I've only gained 9 pounds I felt that maybe the bra was too snug in that area.  But it was  still supportive enough that I would definitely use it. The Fiona, however was incredibly comfortable and soft from putting it on.  I love it!!!  The velcro on shoulders is very comfortable, super strong and easy to adjust so that I got the perfect fit. The side adjustments felt true to size.  I jumped up and down, no bounce.  But my boobs didn't feel like they were being punished. I felt very confident in this bra, which is very important to me. I ran a 5k wearing it this morning and love it even more! I was not aware of my chest while running, it was soft and flattering...NO BOUNCE OR BACK FAT! This is definitely the best bra I have ever ran in so far.  I plan on training for my marathon next year while breast feeding and I think this bra is going to be my new breast friend:) I definitely recommend this bra. For me this is it.  I'm almost afraid to give it a positive review though because I want more of the cute colors to be available on amazon in my size!!!  Sorry this review is so in depth but I am the type to research everything before I make a decision and wanted to share my experiences about the other Moving Comfort Bra's that other people may be deciding about.