They have the best support team. Very professional and always quick to respond. The prices seems to be high but you get what you pay for. I would definitely recommend this upgrade service to any one. The upgrade took a lot of time because of the complexity of the Magento upgrade. The support team took time to understand the changes and then help me upgrade. Sometimes they would suggest to do some changes to the code which was not required and sometimes they did not give the proper instructions. The support team is very good and always willing to help. This upgrade service was very helpful in terms of the Magento upgrade and my business was benefited.