These balloons were brought to me on February 16, I'm writing this review on March 22, and they're still hanging.
They started to deflate and lose their shape relatively recently, but before that they were as good as new. I'm even shocked that helium balloons can last so long (but I didn't pull them or touch them much, I just tied them to a ring lamp so they wouldn't hit the ceiling, perhaps this also extended their life).
In general, they are still pleasing, and it will be unusual without them. Definitely, I'll give 100 out of 10
They inflated balloons a couple of times. In general, everything is fine. Although knowing how much a helium balloon costs, the price is something else...