Instruct: Classify a review into positive or negative sentiment.
Query: The problem is about support

I used a daVinci during 1 year, I think it's a good gadget, but it has a very big problem with support from Royal. The daVinci has a button to upload applications, but Royal hasn't released any SDK (Software Development Kit) in order to developers make programs. In other words, you won't found any program for this PDA, you're limited to the original apps.