Telerik Grid – Form Template Edit Form for the CRUD Operations

I use Telerik Grid - Form Template Edit Form for the CRUD Operations in my asp.net web application.

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but the web designer has told me that the telerik controls has many issues concerning :

  • The User experience (user like to see every thing from the beginning rather than (for example) click edit to show the form for editing or insert)
  • Hard to customize the design (Apply specific CSS )
  • Performance issues

Are Telerik controls have problems from UX perspectives? What are the alternative especially for CRUD operations?