It's definitely at the low-budget end of the router market so I wouldn't expect it's reliability or longevity to be all that hot.
I paid well over a £100 for my router 7 years ago (a wall-mounted Billion model) and it's been (and continues to be) utterly trustworthy.
That Tenda won't be in the same league but I realise we can't all afford to choose from the upper end of the market.
I'm just giving my opinion, it's not a brand I'm likely to touch. I've had routers from that sector of the market in the past and it wasn't a pleasant experience with any of them. That's what made me set my sights higher.