Haven't seen these on our shores yet.
BSE is the manufacturer....MSO and Monsoon are just names created by different Aus importers.
This is a different model than the MSO/Monsoon.....all made by BSE.
In the same way Apollo is the manufacturer of Orions that are badged Atomik or Monster etc. by importers.
BSE just ships them with whatever name on the stickers you like. This importer has just decided to keep the BSE name on his stickers.
Check out
http://www.bsemotorcycle.com for the range of BSE bikes and you should find this model there.
The model you posted has the same spec engine (except for elec. start) and forks as the BSE/Monsoon.
It has a different carby, rear shock, front rim size, sprocket ratio, tail pipe and (obviously) chasis and plastics.
Definately better built than the other option in this price range, which is the Apollo's. (AGB 21/27/29)
I'd like to check out the quality of that twin-spar frame up close, as the AGB29 frame hasn't been getting a good rap.
Criticisms....not too sure about that swing arm, particularly the end....it's got the lighter nobby tyre...I don't like the elec. start cause it's extra weight, battery is in a prick of a spot, and the starter motor is just one more thing to go wrong.....bit tall in the sprocket gearing...and finally I don't reckon the dipped seats are too comfy. Most of these things are easy and cheap to solve but I'd prefer it as close as possible to what I'd want, straight up.
If thats the style you like....I'd buy it over an Apollo/AGB anyday.
Just an edit....the blue one has the better tyres and a better final drive ratio of 16/42 instead of 16/48. 428 chain chain and sprockets. It also has a nicer looking tail pipe. It is also just kick start. It has a mikuni carby. I noticed too that this model has good protection from the chain rubbing on the swing arm top and bottom (better than the MSO/Monsoon), but no roller. I suspect the blue one (A17) is newer stock/model, it is definately the better bike.