Sadly, as we've seen in recent years, in practice this system often does not even resemble having representative government or any real accountability to the electorate.
Mostly it actually resembles having a field of candidates where many voters don't much like any of them (with an inevitable "Well you should just run for office yourself then!" retort when this is pointed out), who campaign based on a tiny number of issues that will utterly dominate the voting but that are invariably determined by what is prominent in people's mind during the relatively short electoral period, and who may then proceed to do whatever they like, even to the extent of completely reversing their stated pre-election positions on those major issues for no apparent reason, with at most a possibility of subsequently losing their job as much as five years later. In many cases, even that won't happen.
However, in almost all cases, issues outside the top 2 or 3 in election season don't count for much at all, even those that may significantly affect millions of people over the term of the next parliament and government. Sometimes, issues that come to dominate politics for several years -- such as the Iraq war, or the negotiations to come over what Brexit will look like -- will be mostly or completely unmentioned at election time. By the time the people have any say over those decisions at the next election, the country may already have been committed whatever the consequences or (un)popularity of the decision with the electorate.
If the Brexit referendum campaigns showed us anything, it was that any pretense of elected politicians somehow being better informed or better able to make good decisions than a lot of the voters could make for themselves is laughable. The biggest sources of misinformation during the campaign were almost all senior MPs, and those on both sides repeated half-truth after arbitrary prediction after outright implausibility. The best sources of objective information and considered opinions were mostly non-political experts, and the best arguments I heard for voting one way or the other invariably came from normal people who had used the multi-month campaign window to educate themselves and form their own opinions on the issues.