I liked the idea of shaving with a shavette before spending lots of money on my equipment it gave me an idea of what it was like to hold a straight razor and ultimately use one.
Now that being said, IMO it is not fair to compare straights and shavettes. This is like comparing apples and oranges. The thin blade used in a shavette is different than the edge you will have on a straight even a hollow ground. Although the blade is backed so to speak by the holding mechanism it is still flexible and IMO more flexible than a straight. Second the angle at which a shavette is held to your face is different than a straight as far as I found. I find that my shavette would bite me easier than any straight I have used to date.
All in all I think for the similarities which are basically looks and general handling it is a great way to say yes this is for me or nah I am not into this and will spend no more money. Looking back I am glad I tried it but I have not used my shavette in ages and it is in my work locker just in case I have a crazy hair or two that I missed.