don't know where the $4,000 came from sticker on the Kona listed the Kona option at $1,450. That included the 16 inch machined finish rims, (in 2000 base ZX3 came with 15 inch rims that were not the 6 spoke style)that with the $400 - $600 bike, roof rack, bike rack, seat covers, floor mats, silver gauge and cosmetic items (side molding and signage) made it a pretty good deal.
The roof rack is a nice design in terms of where it attaches to the Focus. I've used it for my bike and for carrying things home from home depot that wouldn't fit in the hatch.
I wash my seat covers in my washing machine and hang dry them about once a year, they go well with the exterior cover, and still look new. The seats themselves are very clean because they've always been covered. The seatcovers fit very tight and are more slippery, than the velor seats, which I like for sliding in and out. Plus they have several very handy pockets.