The bus from Leam really isn't that bad to be honest, though it does depend on your hours - it's hardly surprising that the housemate who hates it the most is the Chemistry student with consistent 9am and 10am starts. It is frustrating to not be able to just drop into the library when you need to at random hours, and right now I'm weighing up whether to get the bus to the Learning Grid to try and thrash out an essay or stay here, not lose over an hour in travelling time and work in worse conditions for said essay.
As for Kenilworth, the biggest problems are that a) noone lives there, b) there's nothing to do. I have one friend there and that's it. She has to routinely crash at people's houses in Leam after nights out when she isn't with her housemates. If you live there there's a good chance you'll get bored, and fast. The bus situation isn't that bad though, all TravelCoventry buses to Leam go via Kenilworth.