Pixefy is genuinely useful and clearly built by people who understand the pain of checking responsive designs across multiple screen sizes. Having all the device previews, the inspect panel, the SEO checks, and the accessibility simulations in a single tab saves a real amount of time, and the workflow feels polished rather than gimmicky.
I did run into an issue with the Firefox extension shortly after activating my Tier 1 license, but the support team was impressively responsive. They replied quickly, and the issue was fixed in under 24 hours.
Happy with the purchase, and looking forward to seeing how the tool evolves.