Overall, if you're a regular user of HyperTerminal you'll definitely want to check out the must-have Private Edition update, and if you're an expert user HyperACCESS will likely play into your cards as well.
Pros: Free upgrade for the standard HyperTerminal client, adds features and bug fixes
Cons: Lacks an integrated phonebook and some advanced features of commercial clients, rather dated interface and feature-set (with no updates in several years)