Half Log Siding

I was talking with a friend today that mentioned she'd heard of some problems people have with half log siding. Now, this is what we'd planned all along to use. So, if anyone knows any more about it I'd sure like to hear . I love the look of the half logs. It makes the house look like a log house without all the problems of logs. ( or at least that's what I thought ) Anyhow , it's just something I'm thinking about now. Bob the builder doesn't plan to add the siding till spring , so I'd like to learn anything I can about it asap. Still excited about the trip. Won't be long now . Already getting out some warm things to take.