Anyone slashing TRON fees with energy rentals?

I’ve been deep in the TRON ecosystem lately, trying to optimize my DeFi plays and cut down on those pesky USDT transfer fees. Stumbled across this service for trx energy rentals that claims you can save up to 69% on TRC-20 transaction costs. The setup sounds pretty slick – you just plug in your wallet, pick how many transactions you need, and they send energy to your address in under a minute. No KYC, no docs, just an email to get rolling, which is a big plus for privacy. They’ve also got a “Hold Energy” feature that auto-tops your wallet when it dips below a threshold, which could be a lifesaver for high-frequency trading or dApps.

What’s got me curious is the flexibility – rental periods range from 15 minutes to 24 hours with auto-renewal, and there’s an API for devs running bots or platforms. They say it’s all native TRON blockchain tech, no sketchy smart contracts, and they’ve got 10k+ users, including some big exchanges. But the fine print about sending the exact payment amount or losing your funds has me a bit paranoid. Anyone here renting TRX energy for their projects? How’s the actual cost savings? Any issues with the no-refunded payment screw-ups or reliability? And for the tech heads, is the API worth integrating for automated setups? Hit me with your experiences or any red flags you’ve sniffed out.