Experiences with crypto arbitrage scanners?

I'm diving deeper into the technical side of spotting and evaluating market inefficiencies in crypto, particularly cross-exchange and cross-chain/DEX-CEX price discrepancies. Arbitrage scanners seem like a useful tool for surfacing these in real time, but I'm aware the space has significant challenges around latency, data freshness, fee modeling, slippage, and actual executable opportunities in today's markets. I’m respectfully asking for thoughtful experiences from those who have worked with or evaluated such tools: what scanners (or custom setups) have you found most reliable for broad coverage (CEX + DEX across multiple chains)?

I'm approaching this from a technical/learning perspective and would value honest, critical feedback – including why certain approaches may no longer be viable or where the real edges (if any) still exist in 2026. No hype expected, just practical and technical discussion. I appreciate any insights the community can share.

Thanks.