I've got a Gecko. The guitarist from my band turned me on to Warmoth as he'd gradually upgraded his strat to their neck and body. I started my research around March this year and the bass was finally finished in August.
You can see pictures of it here: [url="http://picasaweb.google.com/jugglingdan/WendyWarmoth#"]http://picasaweb.google.com/jugglingdan/WendyWarmoth#[/url]
And its spec. is in my post on the Warmoth forum, here: [url="http://www.unofficialwarmoth.com/index.php?topic=4720.0"]http://www.unofficialwarmoth.com/index.php?topic=4720.0[/url]
I can honestly say it's been the best instrument purchase decision I've ever made, for so many reasons. There is sheer, unadulterated pleasure to be had in near-total control over ever aspect of your instrument's construction. Having settled on the idea of a 5-string fretless, I then went about researching the best possible tone woods, the best possible pickups, the best possible preamp...
Warmoth's reputation is already well documented. Their wood selection, build quality and upgrade options are first class. Even knowing exactly what I'd ordered, when the body and neck arrived a few weeks later they were so much more fantastic than I could ever have imagined. Of course, these parts are just the beginning. You then get to spec. out precisely the hardware and electronics which go on/in it.
Excluding luthier fees (which, if you have good wood-working skills you could avoid completely), strings and new accessories (gig bag, stand, strap), I've spent about £1,100 on my Gecko. That's inclusive of all the parts, shipping to the UK, and all the import/tax/handling charges slapped on top when they arrive in the UK. I bought everything from Warmoth and[url="http://"%20<a%20href="http://www.bestbassgear.com""%20target="_blank">http://www.bestbassgear.com"</a>"] http://www.bestbassgear.com[/url]
Given I bought everything late Spring/early Summer when the £/$ exchange rate was much better, I suppose it would now be more expensive to make the same bass. Of course, bear in mind that I upgraded pretty much everything! I selected expensive woods, a laminate top, all the 'little' options like an accent line, headstock veneer etc. And I also went for premium electronics with Aguliar and Nordstrand. I'm know that a great Gecko can still be made on a much tighter budget but I couldn't help myself!
The resulting instrument has exceeded my expectations in every way. The tone is out of this world; it balances perfectly; weighs entirely reasonably; plays incredibly. It out-classes well known brands' off-the-shelf instruments more than twice the price. I accept it's an irony that I could never sell the Gecko for the price I paid - not that I'd ever want to. I went into the project knowing it wouldn't be any sort of financial investment. Frankly, the journey was more rewarding than any amount of money.
For the fun I've had and the instrument I now own, I think I'd find it really, really difficult in future to justify walking into a shop and buying an instrument. Certainly in the £800+ range I don't think there's anything (for me, at least) which couldn't be out-performed by a self-build Warmoth.