Is Uniswap worth using?

I've been hearing a lot about Uniswap lately, but I'm still not sure if it's worth using. Could you please explain what Uniswap is and why it's gaining so much popularity? Also, are there any specific advantages or disadvantages of using Uniswap that I should be aware of? I'm particularly interested in its security features and transaction costs. Finally, do you have any personal experience with Uniswap that you could share? I'd really appreciate your insights on this matter.