Anam bhiya,
I don't wanted to hurt you. But the drawbacks are really drawbacks.
1. You see, The plug Top is not an Indian one and the soldering iron body (Metal portion including tip) is not earthed which is somewhat risky while handling memory chips and MOS devices. So, though ESD safe written, it will not be ESD safe until you use proper plug socket outlet which have earth pin instead of hole.
Ultimately not ESD Safe.
Ref :
http://electricaloutlet.org/http://whatoutletandvoltage.com/electrical-outlet-and-voltage-information-in-chad/It is written as plug socket as type B.
New products at RCHobbyAddict.com (September 2012)
But in picture it shows type F Schuko outlet
New products at RCHobbyAddict.com (September 2012)
Solution : Cut plug top and fix conventional three pin plug top.
2. The tip pattern is for micro devices are purely pencil point with tungsten costed very good quality. So solder retaining in Tip is not occur at all. But the disadvantage is it go up for silver tin solder temp and 22swg solder wire (regular lead-tin) soldering need expertise, otherwise it will dry too fast. A newcomer learn quickly, but oldies having bad habit make dry soldering too much. Again withdrawing excess solder with tip is a drawback for it's advantage (Of course this is old people's bad habit that they use soldering iron for the work of desoldering pump and desoldering net/mesh).
3. This is not coming with temp control option. so where your supply voltage dips beyong 200 volt, don't use it. you will not get the temperature. It is not the fault of the tool but of our supply system.
4. for the same reason, if your supply system voltage is over 235 volt(specially in night), solder under ceiling fan.
5. It comes with regular cord length. So you may need extension.
6. It has no indicator inside. So, always sense heat before touching hot area.
7. if you are new, you shuld start with this. If you are old, you have to forget the bad-habits of soldering for using this.
8. Don't even try to reshape/change this iron,s bit. Not required. But reshape your soldering thoughts.
Experts may remark in more details about it's advantages and disadvantages with their vast experience.
Afterall Lord Viswakarma have become Lord Viswakarma for his proper tools. So use proper tools and with proper technic.