Anova is a good choice . I have the 800watt and the 900 watt Precision . I think the Precision is up to 1000 watts now . The Nano is 750 watts . Which is fine . The down fall for me with the Nano is the fixed clip . May not be an issue for you , but will be a factor in what you can cook in , and how much water is needed .
That's the single most important thing . Back when I bought mine , some of the stick cookers could not be controlled from the unit itself . You had to use your phone .
Yes the Anova's have the controls on the unit itself , and that's how I use mine .
The blue tooth is nice because you can set an alarm for long cooks . If it shuts down it sends an alert .
It's a good way to finish sausage . I got away from it myself , but it certainly works .
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I have no doubt you could use the slow cooker also . If you're going to get it any way , try it out . Just know what the temps are compared to the setting .