I used the Divacup before, and I'm finding the Bluecup works so much better for me. I rarely got a good suction with the Divacup (nearly always leaked), and I frequently hurt myself trying to insert it. It also made me feel like I needed to urinate constantly. I might have had a better fit with the smaller size in the Diva but then I would not have the capacity that I have with the large Bluecup.
The reviews on this site helped me to choose my 2nd cup, so I thought I would contribute to the experience base here. I highly recommend that if one cup is not working out to sort through the reviews and try a brand with a different design.