Strengths: Extremely comfortable, so much so that you almost forget you're wearing it! There is almost an intrinsic aspect of that fabic that reacts to alllow heat loss or protection from the temperature as appropriate.
Weaknesses: Sorry, could only cite the lack of range of colours
Overall: This is definitely a T-shirt that I can rely on, I have used it as a base layer, individually and with a hydration system. There has been no 'ride up' or rub and so I quickly adopted it as a trusted piece of versatile kit. On long runs where the going is tough and mental and physical fatigue is setting in, you need clothing that you can leave to get on and do the job. This delivers.