Service recommendation letter

Dear Mr. Arnold, I am writing this letter because I am very happy to recommend the services of Clean-Up Services to you. They have been providing us with excellent service and have given us no cause for complain in the past 3years. Their honesty and devotion in providing us with a great service has in-turn gained popularity for us among our guests. I sincerely recommend the services of Clean-Up Services to you. Sincerely, John