this tool is absolutely amazing. wookie's nails are smooth and not sharp and its so easy to use. it was easy to get him adjusted, i just placed it in front of him and gave him bits of peanut butter and then i poked him and stroked his paws with it (while it was off) and gave him some more PB and then i turned it on and let him sniff it and gave him a lot of PB. lol its not very loud too. =]
good investment.
