Yes, bidet attachments are absolutely worth the money. Fact of the matter is, the benefits of simply having a bidet of any kind are too great to not have one. They are affordable, give you no trouble during installation and no matter the kind of model you own, they all perform their basic functions well. Bidets are the de-facto replacement to toilet paper, and chances are, you’ll never go back to it after using a bidet.
You can install one of the smaller models as a test before upgrading to one that fits your needs better, if you’re on the fence. So, you can examine bidet models with a closer eye and look up questions like does home depot sell bidets?