This is the greatest subject at the uni if you don't worry about wasting your money. There is basically no content in the subject, and there's no point in watching or reading lectures, let alone attending them for the sake of doing well in the subject. You can learn the content you need for the online quiz in a good hour or two on the day. It is worthwhile going if you have an interest, the lecturer is funny and charismatic; but you aren't missing anything otherwise.
The group assignments are not the pinnacle of complexity nor of difficulty. It involves writing a maybe 1000-2000 word report about some mapping activity, going into depth on topics such as the materials and equipment used in the prac, any acknowledgements and any problems your group encountered. Note that these fortnightly assessments are worth 15%, and that is one report per group. The practical tasks themselves are fairly fun in the sense that you can go and do stuff, whether doing some physical surveying or just making a map. These tasks usually take a good hour or so (less for some of the entirely electronic ones) to complete and you are given the six hours of prac classes to finish them. That means that the rest of the practical class is spent screwing around, with many people playing games on their laptops; pro-active groups can easily complete the report in that time. Well, that is if you turn up. Generally people will arrive between 5 minutes to 2 and a half hours late to the classes. There is an online group appraisal system where you can punish the group members for not pulling their weight, but it's not like there is much weight to pull.
As I mentioned before, there is an online quiz on the last teaching week. You put your name down for a time and go in and do it. It consists of 50 very short and easy questions; as long as you're familiar with the nomenclature and have a general idea of what's going on (you'll learn everything you need to know doing the pracs anyway), the quiz will not cause any strife. You get an hour but you realistically only need about ten to fifteen minutes to complete it. If you are so inclined, you don't need to do it (it's not a hurdle requirement).
All in all this subject works out very well. For those with a genuine interest in mapping and related fields, it is a fun and interesting subject where you get to play around with some equipment at your own pace, and for those less interested - you don't have to do anything. The staff are great, really approachable and friendly, and have a real interest in the field so you can talk to them for ages.
If you don't know what subject to do, do this.