I love mine!
I've owned an ARLX for about 1.5 months and play it everyday. It is superlight (I don't have a scale), the lightest I've ever played. The balanced design is awesome, makes for easier playing, less stress and fatigue.
The thing I love about it is the way I feel each and every note as I play. The minimal bracing allows the whole horn to vibrate throughout my range and this provides instant feedback to any intonation problems I encounter.
Don't hesitate to buy from Alex. And don't forget to get the Aegis mouthpiece to go along with it, you'll find it a perfect match to your horn!