There's been an increasing number of ukes used in Irish sessions across the UK. This is a really nice mellow example. Nice to hear ITM (Irish Traditional Music) played at a steadier pace too. Cool. If you want a true idea of if it's acceptable with ITM players, however, you should post it to www.thesession.org, but be prepared - there are some very traditional traditionalists on there too. I play irish box and play a few tunes on uke too. It has a lovely, almost harpish tone and, although it's too quiet for a session setting, works really well for solo accompaniment and individual playing.