I believe this type of bridge will take care of business better than a regular bridge that was NOT properly fitted. However, in terms of perfect fit to the top, it will not match a properly fitted bridge.
I fitted my first bridge by using sandpaper only. I played on it for the first few months, and it
looked like it fit perfectly - all around. Then I read (here) about properly fitting bridges. After reading about a trick that Bob Branstetter used, involving using lipstick (some use graphite) on the bass top before pressing (not rubbing) the bridge into it, I discovered that my "perfect" fit was only about 60% perfect. About 3 hours of scraper/chisle action later, I ended up with a fit that was perhaps 90-95%, and good enough for me.
Then again, I saw my friend's bass this weekend, where the there is a visible gap under the bridge feet in some places, and that bass sounds good enough to me. So the question "How important is a perfectly fitting bridge" is a fair one. And like I said, this bridge would probably fit my friend's bass much better than his current bridge. But it's not a perfect fit.
EDIT: Timo, I just read your very last post regarding the gypsy musicians, and you're 100% correct - and that is what I mean when I ask just how important a "perfect" fit is. You could classify my friend's bass as a "gypsy" bass (because actually it is). And this is the type of music where we use that bass. Plus the bridge looks like it's about to take a dive toward the fingerboard. Yet it sounds exactly like we need it to sound. My take is, though, make things as perfect as you can make them, if you have the resources. These gypsy musicians often don't have the resources. So I keep my own instruments in top notch shape, and this is the forum that helps me keep them there.
Off topic: You'll love this gypsy violin bridge

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George