The best thing about decisionrules has been its ability of creating complex logic models with ease! I have had no issues while using this product so far; it's easy enough even if one isn't very familiarized or skilled at programming languages like C# (which i'm not). There aren’t any problems as such but sometimes when there might seem some minor errors regarding formatting etc., they get fixed pretty quickly through support team via email/phone calls without too many hiccups though!! Not really anything specific apart from just being able use all features available within an intuitive interface & knowledge base feature makes things quite simple :).