What's great
I've been using Quackr for a while and I really like the service. It's very simple to use, and what I like most is the privacy. I can verify accounts without exposing my personal number, which is really useful. Paying with cryptocurrency is another big plus, since it makes the process convenient and more private. I also appreciate having free temporary numbers available for quick one-off verifications, while the paid private numbers are there when I need something more reliable.
vs Alternatives
I tried a few other SMS verification services before, but most of them either required personal information to sign up, didn't accept crypto, or had unreliable numbers. Quackr stood out because of the clean interface, the crypto payment option, and the fact that I could test it for free before paying for a private number. I also like that it offers numbers from multiple countries.