Yes Montevideo is pretty, especially along its coast or the "rambla". The downtown part can be a little grimy in parts but there are some really nice plazas and boulevards for walking.
I heard that Montevideo has one of the lowest crime rates in south America. Do you agree?
I don't doubt it, it certainly feels safer than Buenos Aires. I believe that Uruguay has some of the lowest crime rates in South America.
Nice city, I suppose it is easy to make a day trip from Buenos Aires, but guess you need more time then so in Montevideo.
Do you have more pictures?
It takes at least about 3 hours to get to Montevideo from Buenos Aires, 1 hour with a fast ferry boat and then two hours on a bus. I believe there are ferries that go straight to Montevideo from BA but they are more expensive. I would recommend at least staying the weekend in Montevideo, you can swim in the river there which is something not recommended in BA.
A possible day trip could be the 1 hour trip to Colonia de Sacremento, this is the closest point to BA in Uruguay and it is a charming little town.
I have a few more photos that I will post soon.