Cisco provides exceptional documentation alongside each download—caveats, upgrade paths, compatibility matrixes (matching APIC firmware to switch firmware). This is critical because an incorrect upgrade can take down a fabric.
If you are a new user, have an expired contract, or are behind a flaky connection – expect a painful, multi-day ordeal (1/5). cisco apic software download
Would I recommend switching vendors just for download ease? No. But I strongly recommend automating your image management via Cisco’s APIs or a local repository. have an expired contract