I have the YCS50 and YGM-4. Had the YCS50 for two years now and I love it. I researched amps for 3 months before deciding that this was the amp for me. Gets me any type of tone I can want to have and does it very well. Recently picked up this YGM-4 which was all original including the original Philips branded Mullard tubes. Traynors are great amps and I will be a Traynor guy for the foreseeable future.