All of the pens arrived in excellent condition.
This is my review of each one :
1. Blen - by far the most comfortable, I've a small hand and it fits perfectly. Ink is a bit on the blandish side but good overall.
2. Sarasa clip - the best pen on the list and the cheapest individually. Literally the best gel pen I've touched. Ink flow is ULTRA smooth, nice design, good grip, very, very good. Can't praise it enough.
3. Sarasa study - a far inferior version of the sarasa clip, although it has a nice looking design. Grip and all is good but ink flow is worse, pigment is worse, etc., Still, a very solid gel pen.
4. Tapli clip - cool looking bulky design, but ink flow and glide isn't satisfactory for a ball pen. Body is very well built like every other pen on the list.
5. Sarasa dry - I expected this to be the worse of the sarasa models but actually very solid. It does what it says, and is as good as the clip. Very solid choice for left handed people. Probably the best for the price range.