In the last few months I have reviewed a couple of different TWSBI pens and have been critical of both, so the question is with the Eco will it be three for three. Certainly at its launch the Eco raised a few eye brows. The 580 was considered to be a low cost entry into the piston filler world, yet here was a pen for considerably less. Critics were quick to point out the reputation TWSBI were still trying to shed for pens cracking and also that the section and barrel were one piece, making it harder to clean. The fact that you were still supplied with a spanner and silicon oil along with dismantling/cleaning instructions seemed to be overlooked, never mine most other manufacturers would cry foul and invalidate your warranty if they found you’d taken their product apart.