digital gauge

I was wanting to convert to digital gauge but everyone says don't do it and that problems arise. What problems are common? Why else shouldn't i? I understand they are hard to see in day light but this isn't a daily driver. Just a fun little toy.

Nah - I have a digital dash - but I would rather have had analogue dash - the digital is so 80's..... ish., there isn't much of a problem with visibility - the rare odd time there is