Well, it works as it should, a good long lusting 9v battery. From my perspective, it operates at approximately the same time as it's more costly counterparts and makes the job done.
The only minus for me (happened only once, but made me kinda nervous and I think I should mention it) happened when it started to get hot and puff up. Not sure whether it was my fault or it was misfunctioned, but it was an unpleasant surprise.
Still, it happened only once and all other batteries work like a charm. Would definitely recommend it to anyone who is one tight budget or just don't want to spend a lot of money on more costly batteries.