You can do the questions in any order you want, and you can see the whole task and all the parts.
It's less boring in some ways that other online programmes - I think if you are only comparing it to other online programes, it's OK; it's not a fair comparison to compare it to teachers who have time to set and mark loads of worksheets, when some schools they don't have time for that, nor the paper or books, so it's only an uploaded worksheet that is then copied out.
I think it's a shame when schools only use Sparx, especially for the higher sets, as I don't think it does longer problem solving questions well.
But for lower and intermediate levels, it's quite good, and much less repetitive than other programmes in that at least the question types are more varied.
I think schools could change how it's used, and get rid of a lot of the complaints. It doesn't have to take ages - usually about 40 min I find with the pupils I support - that depends on what is set. They don't have to get 100% - schools can decide what to do about that, what they will accept, what happens if 90% is done, etc. It doesn't have to cover topics they haven't done - that's up to the teachers/school for the most part. The school can change the levels, the amount, the topics, the consequences for not doing it, etc, and they can add additional or other homework as well on paper if they wanted to.
I think one problem is that academies often use it, and set it from on high, which means that schools using it don't have much control about anything, and it's often a recent change with the academy so there are lots of other changes at the same time, and it doesn't get implemented that well.