We found a lot to view at a large kitchen showroom. It was useful to open and close oven doors, I soon realised I needed to look for a soft-close door for that satisfying feel. The Miele ovens "feel" nice, also Fisher and Paykel. I researched both brands when I got home and discovered I could buy a Miele with fewer bells and whistles (eg wifi) much cheaper but same build quality. I also looked at Fisher and Paykel and discovered that they are not as good as they used to be, so one to avoid. I have ended up going for Neff slide and hide, though, as it is easy to use and has a nice door mechanism. My point being - looking in person has found me what I want.
I also looked at venting induction hobs, and decided the ones rising up from the middle would not survive long with me using them. I'm too short! I'd knock into them all the time lifting pans. The flush mounted ones look OK, but there is a load of complicated gubbins involved and they are a lot of money. It certainly decided me on a ceiling mounted flush extractor. Again - I needed to see these in person to know they weren't for me.
As for fridges and freezers (OP's original point) yes the kitchen showroom had loads but they all seemed to be integrated. You could see the quality, though. I had a look at Liebherr and they seemed as good as ever. I am taking mine to my new kitchen and not replacing it until it dies of old age!
We have a free standing freezer too, bought when stocks on white goods were a problem, and we got a Blomberg from a local shop. It's been fine, and a good price. The only problem was when DH accidentally closed the door on an open shelf flap, so total user error. We bought a replacement and it was cheapish and easy to fit.
Bottom line @L00byL00 yes look in person if you can. I think it is really sensible.