The case itself is very sturdy, without making the phone feel bulky. It fits perfectly around the phone, but comes off when you want it without a fight. It's not as soft as some of the other gel covers out there, but glides easily into a pocket. The sides are textured which improves grip (good!). I haven't dropped my phone, so I don't know how much protection the case will offer in that kind of situation, but I would guess that it would survive impact with the floor without cracking and would, at least partly, protect the phone. The cover forms a raised edge around the screen side, which keeps the screen itself off the table if turned upside down.
The holes for jacks, microphone, camera etc are all in the right place. The on/off button and the volume control are covered, but there are outlines on the cover indicating where they are. This works fine for the volume button, but I found it a bit tricky with the power button, until I learnt to just press in the middle of the outlined area. You can feel the phone buzz when turning it on, so just hold until it vibrates. The SD card slot door is completely covered, which keeps it from popping open.
The screen protector is great and easy to put on (and held in place by the cover). But I managed to get some small bubbles across the centre, despite cleaning it thoroughly. Make sure you don't pause too long at any one point when applying it and use a credit card as suggested (I used something else which did not work as well)!
The stylus pen works fine. It's actually fairly rounded so much like using the side of your little finger, but nicer on the hand. The tip is a bubble (not solid as I thought) so I don't know how long that would last without cracking if used a lot.
In summary, I am very pleased with the cover and it was at a great price. The protector is good and I see the stylus as a bonus. The delivery was very fast too. I would definitely recommend this product.