Iphone 4s is good but, now days requires many latest features.
Iphone 4s have only 512 mb ram.
By small ram , there should be hanging issues.
Iphone 4s has maximum storage is upto only 64 gb.
So this is very small storage now days.
Another disadvanrage is the screen in only 3.5 inches.
So there may be uncomfortable in gaming and watching movie difficult.
The design is very nice but the weight is very high.
Battery is very less .only 1432 mah battery uses.
So there is better option then iphone 4s now days.
In this phone heating issues also created.
Sound is also not very high.
But if you are iphone lover , you can choose iphone 6 or 6s in good budget