I have a 5 string – and I totally loved it after I got used to the 5th string! The learning curve is way more difficult than you’d expect. I gave it up because I found a Zeta that suits me better – but I wish it was a 5 string!
That being said. I did have difficulty with the 5 string as the string placement is closer together and when playing in any position except 1st bowing became difficult (almost impossible not to hit adjacent strings). I never knew if it was the particular violin I had or just an inherent problem with 5 strings – any one have this problem?