We had an older type and when we replaced the Maclaren buggy with the instep 3-wheeler (this is the pushchair you mean I think) we had to get the new style buggyboard as well.
Have to say that dd at first had a tendency to bite the pushchair handle! but she soon stopped that.
How old is yr dd? If ours had been a bit taller that wdnt have been a problem at all.
We used it from when dd was 2.5 and ds2 was in the buggy until last autumn when she was 3 and a bit. Since then she has walked everywhere and weve sold the board hurrah! (for £20 by the way so recouped nearly half our outlay)
It was very useful while we had it tho.
I've just googled to check we are talking about the same pushchair - is it this one?
That's te one we have and dd used to stand behind the pushchair handle ie outside it with my arms around her iyswim.
Sounds awkward but it wasn't.
the doggy one is what we had (good price here NB) and yes, she stood outside the handle, tho I notice on a couple of websites I've looked at to find this, pix of child standing within the handle....
But I feel outside is less restricting on her (if that's what you want lol). yes, the attachments are fine, tho the bits that fit into the board were at their limit width-wise, but it was not at all unsafe, very study and sound.