I've been planning to get a full review done but with school it really isn't working out.
I love the jacket. It looks great. When I first pulled it out of the plastic and put it one everyone in the shop said, "WOW." Then I got home and my wife said, "that is awesome." It has a lot of curb appeal and I feel more visible in traffic than I did with my other two jackets that are both black. The white is very white, and the red is very red. My cell phone camera doesn't do it justice. The black on the arms is very thick stretch kevlar. All of the other black on the jacket is leather. The logos look great without being to much.
It has been very hot and humid here for the entire time that I have owned it. I have done a few fairly long rides in it. As long as you can average above 50mph or so it is great. For backroad rides it would be hard to imagine anything better. The venting seems to work very well as long as you are moving enough. If you get into city traffic where you are stopping for lights and not making it above 45 then it starts to get hot quickly. I bought some of the Wal-Mart brand "underarmour" to wear under it for extended trips ($11). I think that it is as good as any real underarmour that I have worn and does a much better job of wicking than just wearing a t-shirt. It is basically like wearing "psycle skins," I stayed really dry with it on yesterday even though the heat index was around 97 with a lot of humidity. The humidity is the real killer to evaporative cooling. In a dry climate the jacket would be even better.
I think that all of the armour is absolutely top notch. The forearm armour comes way down. The shoulder armour is permanently formed in which at first I thought was a negative compared with the other A*'s jackets but I realized I would never ride with it out and it will never move in a crash. So I ordered it anyway and when I saw it in person I was extremely happy with it. I was also looking at the A*'s RC-1 and thought that the removable chest armour that it has would be nice so I was kind of torn on which one to get. Then I got my MX-1 and it has removable foam rib protectors. That it not advertised anywhere. They could be upgraded with harder armour for track use. As they are they put just enough extra cushioning in there that laying on the tank is a lot more comfortable. The back hump is about the perfect size. Not huge but big enough to offer extra cervical vertebrae protection. You would have to be going about 150 mph before it (or any hump) could provide much better aerodynamic properties. They are there to provide a bridge between your back and your helmet keeping your cervical vertebra from being snapped forward when your helmet hits the ground. They know that riders won't buy something if it is only there for safety purposes. So they tell you that it is "aerodynamic" and now every rider has visions of being so much faster that they think they need one.
I was able to try on a US 38 A*'s jacket at one shop and a US 42 at another shop. Neither was the MX-1 but they gave me enough of an idea of A*'s fit that I decided on a 40 US (50 euro). I only have a 36 in chest so the 38 fit a little better there but it was really short on me because I am 5'10". I know that isn't super tall but according to their sizing charts their 38 is for people to 5'7" or 5'8". If I had been buying exclusively for track use I would have gone with the 38 for that skin tight feel. The 40 gives just enough extra room that I don't have to work so hard to get it on and it leaves more length on my back. I still have to drop both arms down behind me and bounce it up into place (like any good leather jacket that is the right size) but once it is on then it fits about how it should except for a little extra room around my skinny chest. I plan to wear a back protector on the track so I think the extra room there will work out since it fits perfect across the shoulders and down the arms and back. Note: If you can just throw a leather jacket on like any other coat or jacket then it is probably to big to offer the best protection. Leather is safest when it fits like a second skin.
One morning when it was a little cooler on my way to school, 65ish I think. I realized that it probably won't work very well for a cold weather jacket. The venting is to good for that. It comes with a thermal vest but the vents are in the arms, shoulders, and pits. I think that If you were going to ride with it below 60 you would want to block the venting somehow.
Negative points: 1. The zippers on the wrist are supposedly "semi-auto lock" or some jazz like that. They don't lock very well. If you move your wrist a lot they run up an inch or so. They should have the little leather straps like every other jacket on the planet. The strap for the main zipper holds it perfectly. I wear gloves that have a long gauntlet (race style) and then it really isn't an issue because they are covered. 2. The moulded vents stick up just enough that you can't turn your head quite as far to look behind you because the bottom edge of your helmet hits. 3. The connection zipper is hooked to some elastic material that is anchored to the mesh inside. When you fully inspect it it seems like everything is anchored well but I would like to see it anchored to leather. I'm going to just have faith that A*'s knows what they are doing.
Summary: A great jacket. Looks great. Worth the money.