Not worth even close to $70. I've wired up my stuff, and although I'm one that WILL pay for something if it will take me more time or effort to do as good or worse of a job, this isn't a $70 job.
It looks to me like they put a relay on there to handle the ignition switching with a single wire. Running one wire or 5, no more work except adding the additional taps.
Get taps out of the wrecking yard for your fuse panel (likely for free, with lots of spare wire), buy those small accessory panels for $5-10 online, run the wires, and you are done.
To be honest, judging by that picture, it looks to me like they are trying to convince you that it's worth $70 by hiding all the bare wires hanging out under the fancy cover. Which, with that many wires and only 8 fuses, makes me wonder what the heck is going on behind those fuse panels? If they are using a relay to simplify the power distribution to the panels, then you should have 8 wires going to whatever devices, plus one wire for the ignition 12V, and one wire for constant batt. Thats 10 wires. Looks like about double that in the picture. Maybe they do something clever, but I can't think what, and they don't say.
My accessory panel is pretty simple: one wire on one side of the fuse supplies power to the fuse, the other wire goes to the device being powered. 5 fuses, 10 wires. Besides, *I* get to determine how many fuses are constant or switched 12V, and can change them any time I need to.
If you can find those accessory panels online, you'll see that they are just cheap Chinese pieces that don't cost more than $10. Those are the kind that lock together, I can tell that much. So they just took two cheapies and locked them together, added some wires, a relay, and a junction block (I think that's what that is) and charge you $70. This would probably make sense on a glass or early blade fuse panel that you didn't want to hack the wiring up a lot, but not on one like the '85+ with all the extra terminals already there.
Here is exactly what I have:
http://www.autoelectricsupplies.co.uk/product/308 But of course I got mine from the US. That works out to probably $5/6 US. Here's an 8 fuse holder
http://www.autoelectricsupplies.co.uk/product/311 As long as they don't use a common feed strip (most you will see have one wire input, meaning all circuits are powered at the same time as the feed wire) it will work. American source:
http://www.britishwiring.com/CAT20_21.PDF Cheaper can be found, still looking.
Another source:
http://www.tessco.com/products/displayProducts.do?groupId=615&subgroupId=11&search=false&page=2 I don't like that style, anything sticking out like that is apt to be broken off. You would want the style that sits up off the surface it's mounted on, with the wires exiting underneath IMO.
Not sure if these pics/links work, but
http://stores.ebay.com/AutoReWire_Fuse-Panels-Relays-and-Kits_W0QQcolZ4QQdirZ1QQsclZ1QQtZkmNot
3rd one down, and reasonable:
http://www.wiringproducts.com/index1.html