Safari is the best OS X browser. Wish I could say the same for Windows, though...
Even Apple couldn't stand keeping Safari in line on Windows that they discontinued it. Shame because if they could get version 7 working well enough on Windows it would be great. But no one would switch to it anyway. It would still be great for people with iOS devices that use Windows just for the iCloud syncing, but Apple decided they're instead going to just release extensions for other browsers to do the iCloud tab syncing instead.
Firefox is terrible in comparison to Safari at least on OS X. It chokes to death with a large amount of tabs, mainly because it still doesn't have separate processes for all tabs and extensions like Chrome and Safari. Scrolling is terrible on my Retina. And there's no iOS version like Chrome has. I keep it around solely for porn. Mainly because it's the only browser that has the DownloadHelper extension.
Chrome however, I deleted it from all my devices a few weeks after switching to Safari when I realized I wasn't going back. The experience was just lightyears better since Mavericks compared to the Chrome I was experiencing prior. And believe me, I tested every single branch of Chrome. Beta, Dev, Canary, all of them were the same.
Safari 7 shows Apple's serious about Safari again. I look forward to the future. And probably Safari 8 in OS X 10.10. But if there's one change I'd make, it's that I'd remove the never used Shared Links sidebar tab and replace it with the iCloud tabs list instead. I'd rather have that there than in the toolbar. Also, its tab session transferring isn't as good as Chrome. On Chrome it would transfer a tabs entire history when you opened a cloud tab. But Safari seems to completely forget a tabs entire history and only transfers the current page. Even when you reopen a closed tab...
Also, the "Reopen closed tab" key combo is Command+Z for some ungodly reason. It should be Command+Shift+T like every other browser. Command+Z conflicts with Undo so if I close a tab and then type text, I can no longer reopen that tab. Chrome and Firefox have this command separate and I can reopen up to the last 10 tabs or so with one key combo. I hope 8.0 fixes this. Or even 7.1.
Also extensions are lacking in Safari, but I've been able to find all the ones I need. And have dropped ones I would have used before. I should read up on making my own extensions. I used to dabble in my own extensions in Chrome.
And lastly the NTP is great, but I hate that it shows thumbnails, especially since it doesn't log you in first so sites with login pages will look stupid. I'd much rather have the ability to use my own thumbnails or just show the sites logo icon instead. It would look much more recognizable than most of the screenshots. Especially on web apps like the Plex Media Server and Transmission which look terrible.
They're the only changes I'd make to Safari.
Bottom line is even with those flaws, Safari is still so much better than both Chrome and Firefox on OS X. And I used to be a huge Google Chrome fanboy. Now the only Chrome in my house is the Cr-48 they sent me 3 years ago that I never use.