I have not seen the Benellis in the flesh and both the nearest dealers to me are 20ish miles away (in opposite directions) so not a 2 minute job to go and pore over one (presuming they have stock on site).
They are imported by MotoGB, the same importer as Royal Enfield. Not a particularly good start as MotoGB have not been too impressive with the RE.
Tests of the Imperiale 400 (which I guess from the ex-works price quoted is the one meant - they are £3700 OTR) seem generally complimetary but a couple of things seem to be regularly mentioned :
The suspension is harsh & the rear only has 55mm of travel.
The brakes are wooden & lack feel.
The OE tyres are not great.
They are heavy (heavier than an Interceptor 650 with less than half the umph).
They look nice in the pictures, though.