This is good, but housekeeping staff should be the first line of defense. The person cleaning the room should be able to spot an infestation.
So trained staff may spot them but it is entirely likely that an infestation can go unnoticed until a costumer complains.
Exterminator told me: "That's one of the worst we've seen. We'll send somebody out next weekend. Until then, keep sleeping there otherwise they'll go looking for food and get into your walls."
Do not recommend.