The B3 key suddenly stopped working on my S88 Mk1 exactly 3 years after I bought it. I was asked to send it to the LetMeRepair centre in Germany. I paid for the courier from the UK to German and for the repair. The S88 arrived back with me last week, there were no details of the actual repair, or why the B3 key issue had suddenly developed. On unpacking my S88, I was shocked to find it had some glue like sustance all over the B3 key which was not there when I sent the S88 away. I can't get the glue off and I don't know if it is harmeful because I don't know exactly what it is so at the moment my S88 is unusable. I have attached 2 photos of the glue on the B3 key. I have tried raising a support ticket only to be told there will be a charge for NI repair centre (LetMeRepair) to remove the glue that they themselves put on my S88 and to make it even worse, I will have to pay the courier costs to send it to them again from the UK. I have tried calling NI in the UK to complain, bizarrely the on-hold announcement started by saying I was second in the queue and the call waiting time was 1 minute. After over 20 minutes on hold it had gradually moved to I was the second in the queue and the call waiting time was 19 minutes so I hung up and tried to call the NI head-office number on the contact section. The number rang a few times then went to numbe unobtainable. To say that I am now totally unimpressed with NI is an understatement. This is just beyond a joke, Native Instruments support seems to be almost nonexistant. I am a professional musician and composer, NI are supposed to be offering professional kit for professionals and they need to very seriously take a look at their whole customer support if they want to be continue to be the company of choice for professionals. There is absolutely no way I am going to spend any more money on the S88 to correct something that th NI repair centre caused and if this issue is not satisfactrilly resolved by NI quickly then I am going to order an 88 note controller from a competitor and get rid of the S88 altogether. I expected much more from NI, if this is how they treat their customers then I won't be staying a customer for much longer.