Swimming goggles are a very personal choice. We've tried lots of different makes over the last 5 years that my daughter has been doing club swimming and she finds these the most comfortable training goggles. They last for about a year at a time on 9 hours swimming over week. They don't give her such pronounced goggle marks as other ones she has tried.
This product used to come with a protective case which was most useful as it prevented scratching of the lenses. I would suggest that Arena re-introduce the case with this product. Otherwise we are very happy with this product and it is the third pair of this make and moel we have purchased.