I've had a Ti-Tech for ~7 months. A few observations:
- The sizing is freaky - I wore a size M Arai Signet; but, it took a size XL Ti-Tech to fit my punkin. Even with the jumbo size, the opening is very small, so, when putting it on, I use sort of a rocking motion (pull down over one ear, making sure it's flat. Then pull down over other ear). It sounds more complex than it is, and takes no more time than helmets I could just pull straight down. I believe, by the way, that this weird sizing is unique to this model, as opposed to all AGV lids.
- The fit is snug but VERY comfy (high quality removable Coolmax wicking liner). It remains comfortable after a couple of hours (haven't worn it continuously for longer than that).
- While overall quality/fit/finish seems high, the vent levers seem a bit fragile. They haven't broken; but, they just don't feel as robust as I'd like. Levers aside, it's nice and drafty at speed.
- I can't say I've done a hardcore comparison with my Signet; but, it seems quiet enough, and it's definitely light enough.
- The visor stays put in any position. Also, it's not at all difficult to change. And just to sweeten the deal, they included a spare mirrored and a pack of tear-offs. Those have been REALLY handy on my commute
Overall, I consider it money well spent (especially since it was a closeout).