I bought them for my golden retriever and since then they have become his favorite toy. Each ball lasts him about a month until he destroys it, for me it's definitely worth it.

Very good quality, they were used for beach rackets, so the requirements were not very high

NEVER buy tennis balls on sale. The reason is as follows. I bought them and before I finished one match (probably because they must have been in the store for 100 years), it felt like I was playing with a beach racket. If that's not the reason, then the balls are just garbage in general. Generally, the balls I use, even two months after purchase, play perfectly and last at least 2 matches. I hope to save someone with my wasted money.

Good quality balls and at a good price (7 euros). Tested for matches on clay surface. Last for 5 games of 2 hours.

They are quite good, especially if you want to change regularly, like me who changes after 6-7 workouts-games...
Normal bounce, nice feel and control...
Of moderate hardness, I think it has a good balance...
The only negative is that after 6-7 times, they are usually useless...

Sorry for the review that is irrelevant to those who may be reading it. But some may be looking for it like me. I didn't buy them for tennis. But for my dog. As a Labrador retriever who loves to play and bite balls, they held up very well. The cheaper ones break immediately. These are quite durable.