Portable vaporizers (no2 vaporizer)?

hi, im looking to buy a vaporizer. I found the portable no2 vaporizer and it looked nice. im buying this with friends so is it good if your smokin with a group of friends? Also is it hard to use? what temperature do you like it on? All in all please tell me some key details about it and if you like it or not. Thanks! ps- is it worth the cost (179.99) THANKS AGAIN