ok here is how fast it works for me... when i have a fresh bowl loaded, i usually start at 335F to get a feel for the starting vape temp of the current budd, that takes about 15 seconds. but when i have a bowl that has gone through a few vaping sessions, and it needs to go to 450F then it takes about 45 seconds to 1 min at the most.. but if this is being done outside at the north pole, i am sure the time needed would be much longer.... i would say that 2 mins must have figured in much lower ambient temps than 65 - 70F.. if u have ever owned a vaporizer, then u will be very pleased with this one... u will say to yourself that u wished that was your first vaporizer as i did, but then again, when i was using the trashy ones, i thought all was well while they were functional, and as long as i tweeked all my actions just right for the vaporizer then i had success... this one is success every hit... as far as temp increase, i would say about every 2 or 3 tokes increase temp by about 2 to 4 degrees.. u will know if the temp has outpaced the budd or whatever herb u may use...