Everyone (yes, including you) should be including a good sunscreen in their daily routine. I'm a big fan of including it in a product you're already going to use (the moisturizer), so it is hard to skip.
With this moisturizer, you get a bit more moisture than many daily moisturizers provide. Which is probably the reason why I found everything a bit too much hydration! Without A-Bomb, this was a little more hydration than I usually have in the morning, but was still fine for my combination skin. I had no crazy shiny issues! There was no residue left behind and I have no problems applying makeup over this lotion.
Note that the Somme products, with their Vitamin A, probably do make your skin a bit more sensitive to the sun. Combine that with the fact that you should be using sunscreen every day anyways... and yeah... you need something like this.
Note that the presence of vitamin A in the MDT5 technology means that this entire line should be avoided in pregnancy.