I did not reply as I had not used this recently, but more than 3 years back, so my findings may not hold good at present.
3 years back the MMI and Satguide maps had far fewer POIs as compared to what is available now, and of course fewer town were covered, detail was much less. At that time the comparable OSM had a very similar map, but with less detail. However, where I stay in Mumbai, it had much more of a positional error, that is, the entire map appeared to somewhat shifted to one side as compared to the other maps, using the same track on my GPS as reference.
Perhaps that has been corrected now - as I said I have not used it for quite some time. For most purposes the MMI map is probably the best, and now it is not particularly expensive either.