I dont know your experience with the tank but mine wasnt that great, until recently I carried my tank for work, when I had to be out and about meeting clients. I hate fooling with the blasted tank attys. I can only seem to get 1ml of good vapor then its too dry or flooded or mutes the taste so bad its like smoking an analog. Im on day 3 of giantomisers and really think this is going to replace them as my "work horse" just because of the ease and appearance. I cut the rubber cap on mine just a bit for my VG juices, other than that Im on 3 fill ups on both of mine and no problems yet.
As for map tanks I love mine on my infinity. I get a little bit thicker vape but not much, i can use my favorite drip tim in stead of the rubber tip on the giant, because it seems to be required to cover the filling hole as seen here
GIANTOMISERS!! - My map is a little more peculiar looking to people as well. With the tank or giantomiser its easy to give a short explanation, where as the map tank seems to freak people out or I have to explain it in depth.. I love my map tank but am quite happy with the giantomiser as well its really a preference youll have to try to see the difference