Bought one about 2 years ago. Got the one piece. Works good and is tolerable as long as your moving. In the winter, you need layers beneath it. Too hot for trail riding as you will boil without air movement. A couple weeks ago, on my r2 in a down poor, my legs got wet as the zippers inside my legs were exposed directly to the rain at 60mph.
I bought it when a dl650 was my only bike. I like it for good fit, ventilation and easy on/off. You'll like it. Better than all the various street gear I bought before it.