I own a Devenci Frantic DH bike. My buddy rides a Hectic. I know nothing about road bike geometry and I don't konw how much of there manufacturing crosses over from road to mountian but...
I am very happy with my frame as far as strength and fitment. It is strong and given me little problems other than a few maintenence issues with the pivots. Non of this factors in to a touring bike.
As far as contsruction goes the welds seem decent, although uneven at times; that is just the character of a hand made frame. Everything is square and true. The only issue that my buddy and I have had are with the bearing surfaces. They did not face the headset or Bottom Bracket surfaces. This is a minor beef really, but it did somewhat bothered me. My roomate had a shop do it after the fact and believe it or not the cranks spun more freely.
I'd agree with the above comment, if it fits right and is spec'd well buy it. I know road is different then DH, but a good fitting bike is not always easy to find. After you've ridden it for a while and it's ready for it's first major service have a reputable bike ship pull out the headset and BB. They can face those nasty surfaces to add that final fit and finish that a bike of that calliper deserves. Who know's maybe they do it on their road bikes and it's just the DH stuff they skimp on. After all, generally the DH market isn't looking for that same level of fit and finish.
Good luck with your purchase.
Cheers
Maurie