The Solaris (tm) comes with a 3 year warranty on parts and labor.
All sales are 100% guaranteed; if you're unhappy with your purchase, you can return it within 2 weeks for a full refund as long as the synth is still in new condition. (I'm not sure how the VAT would be handled in that case, so I will need to check that.) You would also have to pay shipping on the return. Any damage to the unit (scratches, dings, etc.) will be accounted for by a deduction of your refund.