OptiBond XTR (Kerr Self-Etch, Light-Cure Universal Adhesive) ... I am very cautious about switching and recommending a new bonding agent.  There are credible reviews sanctioning the approval for Optibond XTR as a credible adhesive system.  This is an impressive system that provides universal compatibility for all direct and indirect resin systems.  

• Outstanding bond strengths to dentin and enamel. Extraordinary performance for long-lasting restorations, enhanced marginal integrity, and reduced microleakage.
• Self-etch. Minimizes post-operative sensitivity, maximizes patient comfort.
• Direct and indirect restorations. A true universal adhesive – eliminates the need for multiple bonding agents.
• Proven OptiBond™ Technology. Dependable clinical performance and reliability.