It doesn't matter how well the body is engineered, it'll still feel like any other £2.50 rollerball from partners on the paper.
Sorry, but servicing? What? What can go wrong, it's a pen?
Well the weight of the pen means it feels a little different to a regular £2.50 one, but the ink coming out is the same for sure. But that is like saying a £5K Rolex tells the time the same as £5 Casio.
I believe the servicing consists of replacing the spring inside, checking the thread on the cap is still working and giving it a good polish!