I had a sweet armor bumper and the mugen extended for the GNote 1 and they both fit perfectly, hence i asked =) It is indeed a little pricey so it will depend on personal preference, i guess. I have tried cheaper bumpers for the note 1 and none of them look as good as the sweet armor. Of course i understand some would prefer cheaper bumpers but this one has awesome look and finish. The sweet armor on my Note 1 still look as good today as it was on day 1 when i got it. Admitedly, I haven't dropped my Note 1 (thank god) so i cant say too much about the durability though. Not sure about the cheaper bumpers (i havent used them long enough) but definitely no dents/scratches from everyday wear and tear for this one though.
The only problem i had with the Note1 sweet armor though is that i lost a screw once and i had to replace it (it came with 5 extra screws btw) but that was my own negligence (prob a loose screw), never lost another screw after the first one til today =) the fit was awesome for my Note1, never had a reception problem (or not bad enough for me to notice at least). The extra weight wasnt a problem for me (I use a Note1 with the extended battery remember) but i'd think it wont add too much weight to a standard GNote. Just removed the bumper from my note1, and saw no scratch (from the bumper) on the sides of the phone.
PS: I went ahead and ordered one today and already got my shipping confirmation few hours later. I will try to update here with pics when it arrives. If it doesnt fit my mugen extended then i guess i will use it when im using the standard battery (I usually switch extended/standard battery depending on my need at the time). It will take a while cause i was being cheap and chose the cheaper shipping option.