tenda is still better than dlink. So if you have a dlink router you can get tenda to replace it.

as a router brand tenda is not bad, but if you see too many options in their routers like with asus than you should avoid because at a cheap price, the division of cost has to be done right with the price or the quality would be bad (like dlink as dlink put too much effort into features of their firmware rather than hardware/firmware quality).

tplink isnt innocent either. they do have issues, just as a basic router tenda and tplink are totally find.

Under all circumstances however, make sure to avoid dlink even if its a modem.