I had two or three and bought two on an impulse. I only utilize that many once a year but I like it. I brew three or four that take a while before they're ready to drink and one or two that are relatively fast (one month). It helps for not staring at fermenters a couple of times per day.
Bottling at 1.016 is a bit high so being slightly cautious at bottling time is a wise thing to do. I suggest you give it until Sunday and if it hasnt moved its OK to go ahead. However you might consider using one PET bottle to check to see how carbonation has proceeded which will give an indication as to whether the yeast has decided after all to consume those last sugars from the primary as well as the priming sugar.
The idea is that if you use one or more PET (plastic) bottles as opposed to all glass, you will be able to feel how the carbonation is progressing by squeezing the bottles. If you prime at the rate of say half a tsp sugar per 500ml beer the PET bottles will have a little 'give' in them at the end of the carbing period when checked at room temperature. If the PET bottles are rock hard there is a possibility that the beer is overcarbonated. Clearly you cant check glass bottles this way. Any PET bottle will do so long as its held a fizzy drink. And if its clear PET keep it out of the light particularly sunlight since this can cause off flavours (its called skunking for some reason)
If it reads the same over the course of 3 days you're fine. If the gravity is a lot higher than expected then your yeast may have stalled. There are ways to make it move again. You can stir a little, very carefully so you don't get o2 in there, to make the yeast go into suspension again. You can turn up the heat.
