Big question so here's a few highlights as to what's so good:
– The views. No photograph can ever really convey just how majestic it is being in the high mountains (which we don't have in this country). You simply have to be there to really understand what it feels like.
– The sheer quality and abunance of the riding. Imagine taking all the very best bits of every single trail centre in the UK and then putting them all into one area and you still don't come close to the quality and quantity of the riding in the alps.
– The lift service. Everyone can benefit from this, even people who only ever ride XC/Trails because no matter how how the lifts take you, you can still do an all day ride and make more altitude than you ever could in the UK. Then at the end of the day you've still got around 1000m of altitude still in the bag to enjoy.
– The atmosphere and ameneties of the location. Most of the alpine ski resorts are MTB meccas in the summer. Unlike many of the UK trail centres, the apres riding is great: great food, great beer, great atmosphere.
Any bike will afford you a fantastic holiday; it doesn't matter if it;s a hardtail, 100mm race bike or 200mm DH bike.
Your discs are however going to suffer, being only 160mm they won't dissipate heat as well and you will probably find them getting cooked (which means they stop working) quite quickly. The descents are just so long in the alps that you need larger rotors or the skill and nerve to not use your brakes to control your speed. Good news is that it's easy and relatively cheap to go up to 200mm rotors even if it's only temporary.