50 KES buys you 150 MB or 150 SMS or 16 minutes calling in Flex. As the name suggests, this bundle has great flexibility. But flexibility comes at a cost. 16 minutes in-bundle calling time is at a colossal 3.13 KES per minute, in-bundle. Or 0.33 KES per SMS.

Safaricom are genius at making simple things unclear. Like when the bundle expires. They say: the daily bundle is valid for 24 hours. They also say: auto-renewal will take place at midnight. Waiyaki Way time warp? We are lost...

By comparison Telkom Holla Premium gives you 200 MB plus 300 SMS plus 300 minutes on-network calling and only charges 2 KES per minute for off-network calls. All this over a 3-day period.

Our review conclusions: If flexibility comes at this cost, you may consider rigidity.