zone chips

any of you guys got a 'zone chip'

they for sale on the e30 zone. ive been reading loads about the dirrerent chips you can get for my car and wondered if there was any experience of them

im done in trying to work out which one to get but to be honest im thinking along the viper2 from chippeduk

i would just get the chip sent out to me and fit it myself.

are there different forms of the chip ie a mild or strong tune chip.

thanks for any info