The rose shape makes it surprisingly easy to insert, and the 3.9 cm width feels like a nice full stretch without being too much. I've used it a few times now and the base sits comfortably so there's no worry about it going anywhere.
The rose design is actually really pretty, not just a gimmick, and the 3.9 cm size feels substantial without being too much. The surface is smooth and comfortable, especially with a bit of lube. Easily the best one I've tried so far.