Nice colour, but definitely over-sharpened.
There are numerous ways to sharpen and it's down to personal preference which method you use. I prefer to apply USM in small amounts applied several times till it just starts to look too much, then undo the last step or two. It's very much a judgement call on when to stop though.
The general rule is sharpening is the last thing you should do to an image prior to saving it. The reason for this is that digital sharpening works by increasing contrast in adjoining light/dark areas. Any adjustments you make after sharpening which have an effect on levels or contrast can therefore have an adverse effect on that careful sharpening you've done.
If you reduce a pic in size for web viewing, you ideally shouldn't have sharpened the original, but you'll certainly need to sharpen the smaller version as reducing the size noticeably reduces the definition.
The very 'pitted' appeance of these shots is the obvious sign of over-sharpening, so when you sharpen, be aware of that, and also look out for halos appearing where you get light and dark adjoining areas.... the skyline is an obvious one where halos can be a problem.