The T-shirts can be good "underneath" wear. The fabric itself feels OK, but no comparison with Hechter, Tom Tailor or similar. The biggest problem is that the shirts - even at 30 degrees with 600 tours - wash after 2x not recognize them. The shirts are then "wider than tall" and look absolutely bad.
As "real" t-shirt is not usable, suitable as an alternative to undershirt, however.