I have a dozen of these and a dozen of the plastic ones with holes in them. I spend long periods of work overseas in an area where there is no golf facility whatsoever, and where, in winter, the temperature can drop to below minus 30. So I practice hitting these balls in my apartment off an old piece of carpet.
Being in an apartment, they bounce off the windows, the light fittings, the TV, etc but they are light enough to have caused no damage whatsoever. Of the two types, I would say that these have a more solid feel than the plastic type and are more durable. However, they are definitely noisier, making a distinctive clunking noise when they hit the walls. I have also noticed that, when hit, they seem to always fly with a higher trajectory than the plastic type.
Whilst they are good for practicing the swing and chipping technique, they cannot entirely replicate the feel of a real golf ball, particularly when chipping, because of the lighter weight. After practicing for long periods with these balls, I have found that when I then chip with a real golf ball, I tend not to put enough power into the swing and the ball inevitably ends up short of the target. However, compared with the advantages of being able to practice indoors in inclement weather, that's a minor problem which is soon overcome once I am back on a golf course or driving range.