We've ordered many great pieces of gear from Thomann over the years, and it's never nice to return anything. However, this was one.
There are good reviews here for this guitar from other owners, so perhaps we just got unlucky.
Anyway, here's my report:
We bought this guitar as we wanted an electro-nylon string guitar for a live number.
The strings were poorly wound over the bridge - Replaceable.
The bridge was too high - Fixable.
The nut slots were too high - Fixable.
The neck had a back bow - In the absence of a truss rod, pretty much impossible to fix.
I didn't check the sound of the pickup system.
I suspect many beginners (and parents) wouldn't realise why a new Yamaha wouldn't be a good guitar. It's because cheap classical guitars, though precision cut these days, can be rather flimsy, with a tendency to warp in transit and/or because of the cheaper construction materials.
A beginner with such an instrument will quickly lose interest because they're trying to play a guitar they don't know is unplayable. If that's perhaps you, my advice would be to take any new guitar immediately to a pro and simply ask if it is - or can be made - playable. You're basically asking if the neck has any back bow, too much of a forward bow, or if it's warped. It'll take any decent luthier about 2 minutes to tell you. If it's ok, the only work you will, most probably, need to have done is setting the height of the bridge saddle and the nut slots, and a new set of strings. About 100€ max, which would still make this guitar a good buy.
Thankfully, Thomann's 30-day return system is superb. Remember to unpack the guitar carefully and don't damage the box.