£80 bicycles are not often up to much, especially when they also have suspension (try searching google for "bike shaped object"). This bike is has rigid forks, which means that there is money to spend on alloy brake levers, brakes and rims. As £80 bikes go, then it looks to be a good one.
When you buy a cheap bike like this, then its quite likely that it will need to be tweaked and adjusted to get everything working nicely, both initially and then again once the bike has been used a bit. Its not too hard to do this yourself. If you get a bike from a decent bike shop, they will include the services in the price. I'm sure they will do it for you with one of these bikes, but you might get an ear-bashing about cheap bikes.
You don't need suspension for riding on roads or smooth tracks. If you want to ride where suspension would help, then you're far better off doing it with a better quality bike, good quality tyres etc. It is possible to upgrade a cheap bike, but its not worth it.
If you can afford to spend ~ £250, then you will get a much better new bike. Alternatively buy a second hand bike.
This deal is part of the 50% off sale at Go Outdoors which is on today.
Fork: Rigid oversize blade steel unicrown ATB style
Shifters: 18 speed, Shimano RD with SRAM rotational shifters and Shimano freewheel
Brakes: alloy 'V' brakes
Brake Levers: alloy brake levers
Frame: High performance steel ATB style
Rim: 26" Light weight alloy rims