My natural gas heating bill was high, though I keep the thermostat below 65. Money's tight so I gritted my teeth and paid. Finally, I looked, and tho nat'l gas prices have NOT risen, I was paying more/therm to this ESCO than I had been to the gas company before I signed on w/Spark Energy. Way more. And my bills were a nightmare to read. If they give you a good deal at first, take it, but watch the price/therm escalate after the honeymoon's over. Jeez. I cancelled.