I've been an avid cyclist for years, but I have now moved to more chilly, snowy climes and must find a way to continue my riding indoors. I am interested in getting a trainer, but I have never used one. I am a plus-sized girl with a big, beefy mountain bike and a cyclocross bike. I am concerned about finding a trainer that will be both flexible for use with both bikes and durable. Can anyone offer any recommendations or suggestions? I'm especially interested in what I need to avoid! Thanks!