I did the half in 2013 (ok I know it's not the full one but hopefully this might still be helpful). Malta in late February is very mild - it was 16oC when I did it. Overall the course is a bit down hill so it should be quite good for a PB. You will have to register to get your numbers etc for about three days before the race (now at a hotel) in St Julians.The start is in Rabat/Mdina but you will get transport from Sliema quite early to take you there. Mdina is worth walking/jogging around before the start - it's the old capital and is tiny but beautiful and pretty much car free. I remember support was quite good at the start and towards the end but not much in the middle although I remember it being well marshalled. There was live music at different points along the way. I would stay in Sliema (Bay View/Waterfront hotels are both good). Medal was pretty decent as well but at the time it had different sponsorship. Results done quickly I think. It's worth doing and I may well do this one again in the future. If you are there for a few days around the event, take some time to check out some of the archaeological and architectural gems.
Sorry - I hope I didn't come across as superior or arrogant - that was not my intention. I can only report what I saw on the day and compare it with events I have done and relate it to my local knowledge of the pavements/roads/paths etc.
not much evidence of segregating runners from the general public. The area is very busy with members of the public out walking, shopping, dog walking etc. etc. Other than the fact that there were a relatively large number of people running at the same time and bloke was carrying a start sign, most people would not have even known an event was taking place. Never mind this, the worst thing from my point of view as someone who has done nearly 150 parkruns, several marathons, half marathons and a load of other races was the lack of regard for safety of the runners and the general public. A case in point (going back to my previous post) is that just after the start, and after the bridge you have 100 plus runners on a standard width pavement used by the public next to a very busy local distributor road. If you have a couple with a buggy, a group of kids, a family etc walking along there, runners are forced into the road (I could not see any marshalls along this stretch). It's ill-conceived and frankly dangerous.
I went for a 9.5 mile run this morning - after about ten minutes I came across the start of this race (I didn't know what it was at the time) by Worcester bridge. I followed the runners for a few minutes before they turned off to go down a path. The set up at the start looked very amateurish and I am sure that from the start to where they turned off I didn't see much in the way of marshalling, surprising since after you cross the bridge the pavement narrows and then follows a busy main road. I also ran past the end of the race. Again, the whole thing just looked very Heath Robinson. I ran about 2/3 of a mile in the opposite direction to the runners and I am sure I didn't see a marshall.