First time poster. I've been riding a set of Stiletto's since Christmas so I thought I'd share my experience. Paid £503 for them in the xmas sale on ProBikeKit.
The ride is superb. I was riding them with latex tubes and Vittoria Open Pro 25mm tyres, so all in all a very light combo. The difference was not just noticeable, but astounding! Smashing PBs all over the shop on my first ride with plenty of climbing.
There was a bit of play in the rear hub. Sceptical mechanic at my LBS suggested it was due to the design, but I think it was just an issue with the hub in my set. I contacted Alex Jones (of VAM, the importer). He was really helpful and a pleasure to deal with. He said to keep riding them unless the play became noticeable when riding. The vendor (PBK) didn't want to know as 3 months went by from the purchase to noticing the issue because I was waiting for better weather before I used them for the first time.
I took the wheels to Italy and rode the Stelvio on them. Great choice. Despite weary legs from riding in the days before they went up the mountain brilliantly (1:55 if anyone is interested). However, on the same ride I knocked the rear wheel out of true somewhere. I didn't notice it on the ride, only when I got back home. Back in the UK, I took the wheels to my LBS who trued the wheel, but said in order to do so one spoke was not tensioned properly so I should exercise caution.
I used the wheels in the Ride London sportive (in the biblical rain), they were great, but by the end the rear wheel was badly out of true and rubbing terribly on the brakes. Again, I didn't notice exactly when it took a hit, so it couldn't have been a big hit. But hit it was and that spelled the end of the road for the rim unfortunately.
Riding in the rain also affected the bearings. I disassembled the rear hub completely and all of the bearings have a gritty feel to them, not so bad it's game over, but they're definitely nowhere near as smooth as they were. To be honest, that amount of rain would test most hubs, let alone hubs with a unique, open design like the Stilettos.
I'm 74kg, so perhaps wheels this light were not the wisest choice. I'd like to think I ride quite smoothly (2 punctures in 8000 miles), but considering my weight and the crap British roads, I think I should have gone with something more robust.
They come with a 2year warranty, and like I said, Alex has been very helpful and patient when dealing with me, so I wouldn't advise avoid buying the wheels at all, just perhaps take the weight limit with a pinch of salt and only use them in the dry. If they suit your riding style (and vice versa), these wheels could be the best you've used.
My house insurance covered the wheels, and given the cost of new rim, spokes and build added to the fact the wheels only come as a pair, they wrote them off.
New wheels acquired, I may well rebuild the rear wheel with a more robust rim in the future, might even give tubs a go! But that's for a different thread when the time comes.
So, all in all, great wheels if you treat them right!