Anyone have experience with deep heat ultrasound treatment for varicose veins?

I have painful varicose veins in my leg due to a combo of heredity, being overweight (though not that overweight), age (41) and old leg injury. My doctor wants me to have them removed by a deep heat ultrasound treatment.

Has anybody ever had this? I’ve looked up some info online but am curious to hear personal accounts. Accounts range from 1:10 to 1:15 who develop burns, which seems the most serious side effects, but I was curious about the discomfort level for those for whom it works.