The Spider gene is a nice looking ball python. The only issue is that they are often known to have a genetic defect known as 'head wobble'. Some you will not notice it and others it will be obvious. This can cause problem when feeding. However i have a male Bumblebee (spider x pastel) which is my best feeder rarely misses a meal and has no signs of head wobble at all. If your keeping him as a pet then you eill just have to see how feeding goes and if he eats then all is well. Its if you look at breeding that there could be potential genetic defects that are more noticalble in the offspring than in your male Spider.

Also i see you bought a 5x2 viv. You did get a bargain i can say but be carefull as if you house a baby ball python in a enclosure too big this cause stress to the snake and he may stop feeding. Try it but if you have problems with feeding id buy a cheap plastic box and use that. My 340g female pinstripe does brilliantly in an 18ltr tub in the rack!