you'll notice that many of the five star reviews are years old. one thing you should consider if this is your first hammer drill purchase is whether or not a rotohammer might make more sense. at this price point and for this technology you can't go wrong with this drill. it's powerful enough to get the job done even up to 5/8" thick.if i had it to do over again, though, i'd pony up more money and go with a longer lasting, quieter, and more powerful rotohammer instead of this hammerdrill. for the DIYer this is probably just fine, but if you find yourself doing a lot of drilling with larger bits then you'll definitely want to step it up to the newer technology.updated: 12/11/10 - older technology is still holding up. the rotohammers of today are supposed to be more reliable in the long-run, but this hammer drill has held up well for me so far so i have no need to shell out more for the bulldog.