After years of riders asking for a true successor to the Garmin RTL515, the SIGMA RECO radar steps in as a compelling alternative. Offering USB-C charging, significantly longer battery life, excellent detection performance, full compatibility with existing Varia quarter-turn mounts, and a lower price. In this video, I put the RECO 81 LInk through real-world road tests against the RTL515 and Varia RearVue 820, highlighting its impressive range and reliability, while also covering trade-offs like a modest rear light, no ANT+ light control, and limited region availability. The verdict: a genuinely capable drop-in upgrade that proves a better RTL515 style radar is possible without overcomplicating compatibility.