i can give you just my personal opinion, but probabily most of the drummers could agree with me.
these samples sounds nice, but it's clear they are samples. IN MY PERSONAL OPINION, the snare drum should be a LITTLE louder but it's not bad. for the toms you could try to use a real recording of toms as a sample.
the kick is good. almost every drummer use a trigger on the kick drum and they sample it.
for the cymbals there is nothing you can do, because every drummer has a personal feel with them. on the other hand hi hats seems to be real