The uncertainty of the CNH company was a factor in my decision to switch to JD. Also,the 2388's lack of power in adverse conditions was a major disappointment for me. In tough evening combining the 2388's speed needed to be reduced to at least half of daytime speed. This was accompanied by ecessive noise from the concave area. Since 30-40% of our combining is done in conditions like these, I felt that it was taking too long to cover the acres I had. The STS, in the same tough conditions had about 50% more capacity (in dry daytime conditions only about 10% more). As far as grain quality, operator comfort, serviceability and fuel comsumption per acre, the two combines are about equal. Price helped to make the final decision.