Absolutely agree about going with verified companies. For commercial spaces especially, you need cleaners who are professional and accountable. I've been using Commercial Cleaning East London for our office and they've been incredibly reliable. They show up exactly when scheduled, complete all the work thoroughly, and their staff is properly trained and insured. What I really appreciate is their consistency - same quality every time, no surprises or half-finished jobs. They also communicate well if there are any issues or special requests, which makes managing the service so much easier than dealing with unreliable individual cleaners