Are there any limitations in crystal reports?

1. In export- While exporting data formatting is lost. 
2. If database is having field whose length is more than 255 characters, then you cannot make formula using that field.
3.When you browse data just by right clicking on the field then it displays that is there in the database not the data selected by the query. 
4.inside a subreport another subreport is not allowed so very big limitations of crystal report.