I have been flying very expensive models for near 20 years now. Have been a died-in the -wool JR fan.When I got the opportunity to use MKS servos and found the value of resolution and accuracy, JR was history! They have a very large selection for all applications, very low prices,(which might lead you to believe that they are not that good), don't be fooled. I would trust a 14k dollar model any time with MKS. Have been using them for around eight years without any failures or issues. Thomas @ MKS has awesome communication and service. I can not tell you about repair service because there has been no reason for repair/return.