We’ve been through several CRM evaluations since Highrise went into maintenance-updates only.
During that time, we’ve seen some terribly unintuitive software and other offerings that look as though they’ll be great but lack some key feature.
Every CRM has a gotcha that you won’t find until you use it in anger.
IMO, seven days is not enough but I also think no evaluation is long enough unless you have the resources to run it fully in parallel to your existing process.