Cooltown physical hyperlinks are an effective mechanism for invoking services in a place such as the Exploratorium where navigation and identification are difficult, though some details (e.g. accidental beacon pickup) need improvement.
The hands-on nature of the Exploratorium made informing and suggesting more distracting than useful, except to those users who wanted to explore an already-familiar exhibit more deeply
The PDA’s are too large and fragile to be convenient for users who want to experiment with the exhibits, given the relative boisterousness of the environment.
The combination of several functions (Informer, Suggester and Remember) was too complex, e.g. users were too busy with the first two functionalities to use Rememberer.