This thing is totally customizable. You can put it on semi-auto, full auto (2-15 BPS) Burst Fire (2-15 BSP) and Turbo Fire. You can also tournament lock this by screwing in the screws inside the grip pannel so you can push the buttons in the back. Oh ya! There are only two buttons- very simple. It has an LCD display so you dont have to go messing with switches on the inside just to change your fire rate.
The car charger it comes with takes up kinda a lot of battery from the car. There is a little white connecter right above the circuit board and right below the piston which sometimes comes out (this happend when I was changing the battery- not in a game) but this can be fixed by pushing it firmly back into place. It takes a little bit of time to change the battery since you have to remove three screws. Since it runs on a 9volt battery it may run out of power but there is an easy way to avoid this. I recommend going to RadioShack (or other electronic stores) and buying a rechargeable 9volt battery and a 9volt battery recharger. The day before you play just pop the battery in for about 10 hours and it will be charged and ready to go in the morning- but always carry extras- just in case. Also, on the bottom the screw holes are verticle (this makes spyder users, like myself- unhappy) If you buy this from your local shop/field I am sure they will be happy to drill new hold in your bOO-yAAH for you- they did for me at least :-). But make sure you have a professional do this for you so you dont waste 240 dollars!!!!
This product is really great if you take the right precautions (charging batteries- pushing in the little white connecter thing) and I recommend it very highly. This is why I gave this product a 9 out of 10.