Never has been for me. Getting them lined up to get all the bolts in is usually a bear. Either the mount is twisted just slightly and you cant get the 4 mounting bolts in....or its twisted just slightly and you can't get the 15mm one in that holds it to the engine. Drilling them out gives you just a smidgen of wiggle room so they don't have to be perfect. Once you get everything started, snug up the one lone horizontal bolt and then the 4 lower ones.
I suppose if you're doing it on a lift with something to properly support the engine, it would be easier. Doing it on jack stands with a jack under the oil pan I have always fought with getting them to line up. Especially when you're doing it yourself and don't have anyone available to wiggle the engine this way or that.
Oddly, I have less of a problem getting the mounts to and from, it's like playing the hokey pokey, wiggle it around enough and it will get down there.