I just started playing Robot tournaments a few days ago. I am a Gold LM but I have not played for more than 5 years. I am enjoying playing this style very much. Here are two main problems I see with GIB bidding. One, they get way too excited when partner balances. I had a 2353 shape, 11 HCP, weak D and passed a 1S opener on my right. After 2S, P, P back to me, I doubled. GIB had a 3442 10 count and felt the need to cuebid! I bid 4D and GIB was still not satisfied, corrected to 4H. Down a few of course. Fortunately I had some company. I have seen two other similar examples. The other problem is choice of suits in slam bidding. It certainly can't handle any type of advance cue bid. It will take any cuebid as support for its last bid suit. No matter how many times or at what level you later correct to the best fit, it will keep "correcting" to the wrong suit. Even worse, I had a huge 3631 hand, 2 losers, opened 2C it continued 2D, 2H, 3D. Explained as 5+ HCP. I bid 3H, it bid 4H and I felt justified continuing with 4S. It bid 4N, I assumed RKC for H I bid 5D and we were off the rails. It bid 5S, I bid 6H. It bid 6S I bid 7H. It bid 7S! I decided it must have 5S and 6D, so I passed. It was 3244 with only honors AJTx of C. Makes 7H or 7N if you find the CQ. How the program played me for S length here is beyond my comprehension. All this said they bid pretty well most of the time and again, I enjoy the format.