In reply to SuperstarDJ:
I have a Wattbike Atom. I absolutely love it and think its well worth the money. My wife uses it as well, just adjust the saddle height (easy) and make sure you both use same cleats (you can have toe clip pedals as well)
Re hard/easy - you have the option of the wattbike app which has lots of training programs on it. You can mount your phone or ipad on the specific holder above the bars. Or you can go down the Zwift route (other apps are available - but I only know this one) Loads of choice and training programs/races/climbs/group rides etc. But you will need two accounts ideally, otherwise your wife will be using yours and the weight/ftp/feed to strava will all be happening as if it was you riding. I use Zwift through a TV using an apple TV for the app (I don't think TVs alone are powerful enough to run the app without a third party device)
The main reason I love it is it's permanently ready to go, it is physically small and compact and has lots of adjustment.As i'm sure you are aware, with smart bikes the pedalling automatically gets harder as you hit gradients. There are other smart bikes available that do the same job, possibly quieter and better, but possibly be more expensive. I have mine sitting on an omnirocker , which makes it even more comfortable and realistic (especially for longer sessions).
https://omnirocker.com/products/omnirocker-atom-stealth
in action here
https://www.youtube.com/watch?v=TWFBUlFk9AI&t=18s
Well worth the money if you can afford - for me a total game changer when I added it.
If you and your wife are going to use it, then I think its much easier to justify the expense. get a good fan (Vacmaster cardio54 with remote control strapped to the handle bars "chefs kiss") and maybe a mat to put the bike on for excessive sweat.
Hope that gives you some ideas - good luck