About a year ago, I almost ordered from THE ZEB as welll, but after reading many opinions about how they suck the big one, and getting many emails from folks verifying the same, I didn't order from them.   
A snazzy website can be misleading...it almost got me.  I love lots of detailed pics of electronic components.  They had a lot, and they almost had my money too.
Sounddomain.com is a good place to buy car audio gear from.  I will tell you this:
1.  They have excellent prices
2.  They are an internet reseller: i.e. they have NO stock on anything:  you order, they order, then ship it to you.
3.  Their customer service sucks
4.  They did not rip me off at all: I got what I ordered, in fine shape, for an excellent price
5.  Expect to wait anywhere from 2 to 4 weeks after you order to receive you shipment
6.  You will need to nag them as to the status of your order:  they have your money, they are in no rush to fill your order
7.  Please see numbers 1 thru 6
And there you have it, my friend.  As brutally honest as it gets.