So far I have only made Colette's separates, the Ginger skirt, Violet blouse, Sencha blouse and the free Sorbetto top. All but Sencha are rated beginner but they all sew up so nicely, hence my multiples. Some of the other ladies can tell you more about the dresses. Mena did a 7/7 challenge based all on Colettes dresses, that too can give you good insight.
I feel the patterns are very good and well written. Colette's blog has nice tutorials on invisible zippers (or zips for Charlotte), bias tape and other goodies that really help guide you through challenges. A Fashionable Stitch (another sewing blog) did a Ginger sew-along with really clear visual instructions too.
I don't think you can go wrong with whichever pattern you go with.
Unless you are short in the body, which I am and I found that Rooibos is too long (and low) in the bodice section, I've got the pattern alts. marked, but the fabric I was working with is meh colourwise & a bit stiff (cordory), and I haven't decided which other fabric to try it in yet. But apart from that I like the pattern.