In one sense its fairly easy as they all do pretty much the same stuff these days. You can have multiple start times, various programs, and set it to do some very specific things.
There are 3 different boxes I’d recommend.
1. Rainbird – These are a top unit by a well known brand and do an excellent job. Easy to use and very reliable they also have a 24 mth warranty. $450-$500 supplied and fitted. These are probably the most expensive of the domestic range.
2. Hunter X Core – These come in a 4/6/8 station box and are very easy to use. There is a two year warranty on the X Core and they are a very reliable box. $375-395 supplied and fitted.
3. Rainmaster – made by Holman these boxes are easy to use and have a 5 year warranty which is very appealing. Lately I have had a few of these fail on me so I’m less keen to use them now. Holman do honour their warranties with no quibbles, but I’m just a little more cautious on using these now. $380-420 supplied and fitted