At the regular price, these are a great value comparable to many quality brand's entry level bibs.
The double layer of these bib shorts appealed to me. I purchased these immediately after a telephone cable knocked loose from a pole by a truck clothes-lined me and caused a crash. Fortunately, my injuries were minor (a raw scar on the neck and a sore throat, as well as a scratch on my hip) but I did get a hole in the bib shorts - something I'm hoping will not occur with this short. Having the options of pockets are nice as well - great for fuel or phone - although with my history, I would put the phone in a jersey pocket rather than where I tend to land in a crash...
As for fitment, I am 6'-0", 32" waist, and 180 lbs. My body shape is weird - I have a long torso and used to be 60 lbs heavier, making my rib cage large for my body. I fit a large in this bib short, and would judge them to be just a little smaller than a medium in brands that fit true to size. I do like the extra compression of the slightly tighter fit, the double layer of material will give you a compression feel as well. Compared to the Entrata entry level bib short, I feel that they are built just a little larger. The straps over my longer torso are fitted, but not uncomfortable. That being said, I believe an XL would probably fit as well if wanted a more relaxed fit.
As for the other features. The chamois is the Kiss Air 2, Castelli's entry level chamois - but is still the nicest one I have in my closet. I have ridden a combination of on and off road rides of ~40 miles with little discomfort. I can only imagine what the nicer chamois' are like... The leg grippers are vertical silicone strips on an un-stitched cuff - incredibly comfortable and grippy. Along with the two side pockets, there are two mesh pockets at the lower back area, allowing you to wear a T-shirt or MTB jersey and still carry your stuff.
Finally, I like the relatively little branding... especially for a Castelli garment A single logo on you left thigh and the word "Unlimited" stamped above your butt - easily covered by a jersey or shirt.
Nice bibs. Good leg grippers. Don't provide a ton of compression but are comfy on long rides. The cargo pockets and back pockets near the bib straps are handy when you don't want to wear a pack and/or want a more casual top.
Great fit and very comfortable for long (3 plus hours rides). The side pockets are very convenient. These provide better and easier access to nutrition particularly when you're hammering those pedals.