Excellent quality and very comfortable. That is clear. Just whoever buys should know that it is quite thin for winter. The fabric of it, for those who buy Minerva and know fabrics, does not differ much from what t-shirts are made of. So I would say they are probably suitable for spring and autumn, without excluding slightly cooler days in the summer.
Because on the Minerva website some are referred to as "sweatpants" while this one is not, I assume that those are made of a thicker fabric.

With a height of 1.81-80kg, I initially got the large size but the shirt was too big and I ended up exchanging it for a medium, which is fine. The pajamas are comfortable and great for sleeping. Maybe the pants are a bit low-rise. Maybe it needs a little attention when washing for the print and ironing (if you're one of those who are eager to iron pajamas :P)