Overall, I'd say this product is middling.
Offers good warmth and waterproofing, as well as a decent ease of entry/exit and interior volume to wear a thick winter sock if you wish. I've worn these comfortably down to the low teens on a blustery day, which is good for someone like me with post-frostbite feet that run cold, despite being a human furnace otherwise. Weight is decent for riding with and factoring the two-layer setup of these. I like the removable inner for faster drying.
Where these fall short though, is they could be better in how securely you can fasten them after putting them on. The single Boa only does an OK job of securing the lower portion over foot, but the strap on top doesn't do a great job of securing the upper, even yanking on it hard only provides moderate anchoring, so the upper still feels floppy - maybe a second Boa dial would be better.
Additionally, the sole on these leaves much to be desired. The lugs are too small, shallow and too close together for good purchase when doing an off-bike scramble, making them slip and slide even in shallow snow. They also cake way too easily and don't clear fast.
The soles do a decent job of grabbing the pins of a flat pedal, though the design requires frequent reseating to have a comfortable foot/leg orientation, esp. for power transfer of the forefoot on pedals. They do OK on wet rocks and roots grip-wise. Didn't try them in the SPD configuration, but I imagine they'd do OK there.
Personally, I wouldn't recommend them and plan to sell them on eBay shortly.
First of all, I bought these on sale. I might not have jumped at the regular price, but now I probably would. These are a real step up from what I owned before. They are not the super rugged boots that folks have for riding fat tires in the snow, but I have found them able to keep my feed warm into the mid thirties. The fit is excellent, and the quality of construction is what we should expect from SIdi. I'm really glad I bought these.
Oregon winters are wet and chilly, and these boots make all the difference. I use them for road riding, with SPD pedals. They don't leak up through the cleats as some shoes do, and the shell is truly waterproof. I find them comfortable down to about 33 degrees, with thick socks. I've ridden in heavy rains for hours many times and they never leak... except, as with every winter shoe I've used, water can get in from the top, and the neoprene collar will soak up some water. But even after riding for several hours, this has not resulted in water leaking down into the shoe. If you're really hard-core about dryness, use gaiters to cover the upper shoe collar, and pull your rain pants down over the gaiters for a perfect seal. I do recommend getting the WIDE version, even for normal feet, as the "normal" fit version made my narrow feet feel pretty claustrophobic. Lastly, the soles are very good for walking, when you need to.
I have enjoyed riding in these boots for commuting. I think that the boots are very warm. Usually riding in weather just above freezing. I like the tread on these boots, which help increase the life of your cleats. I think the boa wires could be longer. Sometimes it can be a little difficult to get the boot on. The arches are a little high for my feet, but don't seem too crazy. The boots are pretty comfy, the sole could be a bit more comfortable (seems a little hard) I would suggest some light insoles for long rides.
