Not really I have made 10 of them, the parker biro bit is housed in a sheath under the rubber so when it is retracted it works as a stylus without interference and when the ballpoint is out it is obvious that it is a pen.
My only contention with it is the aesthetics of the pen design, the pen and capacitive rubber work well and the mechanism is of good quality but the look is a bit chunky and the overall thickness is good for a man with large hands but awful for a lady with dainty digits. However it is the use of a parker refill which causes the problem since the sheath has to house both the refill and the spring.
Now if there were manufacturer that made a 7mm slim line with out a pen but the biro bit were the capacitive tip then there might be a slim stylus.
PG