I purchased the original Venu (the first version) soon after it released and after about a year the OLED screen started showing severe permanent burn in. There is a forum post here with hundreds of reports of people having the same issue. Even Garmin's replacements showed the same symptoms after some months, so it essentially affected all the Venu "1" line.
I also had a FitBit Versa that just died due to water ingress (Fitbits are terrible in that regard) so I really need a new smartwatch.
How's the Venu 3 when it comes to OLED screen burn-in and if someone made the jump from a Venu 1, how does it compare?