I have a Supernova and I'm very happy with it but I was tempted by the black friday offer for the Legend.
I didn't buy one because I hadn't seen a video review of one. I'm glad I didn't buy one tbh because I'm of the opinion that if you buy a standup bag you want it to stand up and not have to lay it down in the changing room to get your gear out. You may as well buy a normal bag with straps that allow you to sling it over your shoulder.
I do like the layout of the Supernova and even though I have Stretton fielding pads which are bulkier than keeping pads it is still a little on the large side.