Customer Rating: 
Summary: This Tremor pak is just to big.
Comment: This rumble pak is too big, uses up batteries rapidly, it's so heavy that you hardly ever feel the rumble, Nintendo should have built-in rumble in thre controllers this sucks.
Customer Rating:
Summary: Two for the price of one.
Comment: I would recommened this item to anyone who thinks frugaly and or economically. This product does exactly as a normal rumble pak but this comes with a memory card. To buy both seperatly would to be spending an additional $5 to $10. I see no reason for this since the tremor pak matches if not exceeds the rumble pak in all forms except its bulkyness.
Customer Rating:
Summary: Can't live without it.
Comment: I came across this product while pricing and comparing accessories for my roommate's new, red N64 system (which I immediately confiscated). I tried to be objective and cut through all the media hype and I'm very happy with this purchase (even if it doesn't match my red controllers). I think it's the best deal for the money that's out there.
The package contains 1 Tremor Pak (which requires 2 AA batteries) AND 1 memory card (great deal). Memory cards can be plugged into a slot located on the bottom of the Tremor Pak without any hassle, so you don't have to unplug the Tremor Pak every time you want to save a game (I've gotten so used to this that I can't imagine doing it the other way any more). The Tremor Pak also has 2 easily accessible switches. One switch allows you to change between SAVE mode and RUMBLE mode, and the other one let's you set RUMBLE mode to Low or High.
I haven't experienced the "loose fit" problem that one of the other reviewers mentioned on any of the 6 controllers (2 that came with the N64, and 4 third-party controllers with various expanded functions) which I have, and though I agree that it's a bit heavier than some of the others, you get used to it pretty quickly, it took me about five minutes to make the adjustment.
I think it's a well thought out design and the ease of switching from save mode to rumble mode alone makes it a winner in my book, especially for the price.
If only they made it in red... Oh, well, Bummer.
Customer Rating:
Summary: This thing ...
Comment: It doesn't even deserve two stars. I gave it one star because it came with an extra memory card... I gave the other star because it tricked me into buying it. This thing just isn't rumble quality, I wouldn't buy it unless you want an extra card spot in it with a card... blah blah... Get a Dreamcast anyways lol.
Customer Rating:
Summary: cool
Comment: I think this product is really good because you can witch it from save to rumble quick. Also you get use to all the shacking and how heavy it is
