Ditto, Win10 is nothing but the product of built in obsolescence with a 10 on the box.
I had no issues updating to Win 10, and of course ED was the first thing I tried. If you're "stuck" with the concept that Windows 7 is somehow better, or that upgrading is selling yourself, then a few things to think about:
1) Windows 7 will be EOL in less than 5 years. Probably April 2020 from what Microsoft have said. The reason is that they discontinued Windows 7 in the Windows 8.1 era, so it's been out of retail sale for a couple of years now, no matter how "new" we consider it.
2) Windows 10 is only free up until June 2016. Then it will cost around £100 depending on the version (although they haven't given concrete pricing, as it's free for that 12 month period)
3) Windows 10 will be the de facto version for upgrades and support from now on. They "gave it away" for a reason
4) Windows 10 has a superb kernel, DX12, and the overall performance compared to the "Vista-a-like" Windows 7 kernel is astounding, especially on SSD systems, but on my 5 year-old, old school gaming PC, moving from Windows 7 to Windows 10 felt like building it from new, and upgrading some components on the way. It used to take around 70 seconds to boot to desktop from the BIOS, and now is closer to half that time. ED launches more cleanly.
But really it's up to you of course. Windows 7 is, unfortunately, on borrowed time now. The fact they never went beyond SP1, which is now over 4 years old, proves that beyond a doubt. I'm typing on my work (Windows 7 Enterprise) machine right now and I love it. But the points above are coming from an IT Professional, not from someone saying "me likely. me likely." Upgrade, and get past the quasi-emotional attachment to a 7 year-old OS. Maybe not this week if it makes you twitchy, but in a month or so once the core issues are resolved with the first patches.