I've been doing this process for quite a number of years, and what I must admit is that it has improved a lot over time. It used to be that you would lose data quite easily. All it took was to go back one page, and you lost everything you did before.
It has changed somewhat, but it still comes down to preparing a lot beforehand. For people who have done it, as Sean was mentioning, you have it set up beforehand to make your application easier. I think that would be difficult for a novice person who is applying for the first time or who has applied only a few times. It would be a bit of a challenge in that regard.
A little bit of advice might be to have more of a pre-application checklist or maybe a list of the questions beforehand, so you can prepare for them beforehand. It would certainly make the process easier, especially for the people who are new to that process.