Bottom line up front: would I stay at ULIV’s complex at 227 Colima in Roma Norte again? Probably. I was there for a nearly two-week stay, so I can give you the pros and cons pretty well.
PRO:
•	Well, it’s in Roma Norte, which is simply fantastic — only Condesa or perhaps Coyoacan are as pleasant a Mexico-City neighborhood in my view. Can’t beat the location. There is a coffee shop at the corner called Constela’s that became my office across two weeks — really exceptional.
•	The ULIV staff, from the guards to the attendant to the housekeeping staff, were genuinely superb. Responsive, pleasant, generous, willing to help. They all deserve a raise. I was tremendously pleased every time we interacted: they have a spirit of professionalism and are sincerely interested in making your stay a good one.
•	The apartments really do have everything you need for an extended stay. A coffeemaker, a kitchenette, a laundry room with free detergent, etc.
•	I want to especially mention the rooftop terrance, which no one seemed to be using while I was there. Why not is a mystery, because it’s great. Superb views across the city rooftops, nicely done, just a joy to experience. A very well done space.
•	If you’ve traveled in Mexico enough, you’ve encountered buildings — including AirBNBs — where you have to put used toilet paper in wastebins instead of the toilet. I find this exceptionally distasteful but it’s a norm across Latin America. I am happy to report that 227 Colima is a modern building where this is not necessary.
CON:
•	Unfortunately there was some corner-cutting in the construction of this building. I was in apartment G, and was horrified to discover that it is entirely possible to see directly into apartment H, because the walls don’t quite meet around the frame of the conjoining doors. This also means that the activities in both apartments were completely audible to one another. We all knew when the adjoining apartment woke up, arrived back at night, etc.
•	Another example of the construction being less than ideal is in the shower door, which does not actually seal when closed. I came to accept minor flooding of the bathroom as the price for a shower.
•	There are some infrastructure attention-to-detail items that show through: for example my refrigerator was iced over, and the provided (white) towels can be badly stained.
The cons, to me, are all easily fixable by ULIV (especially the towels, which could be fixed tomorrow) but they are sufficient that they should be known before reserving.
On a neither pro-nor-con point, everyone noting that the apartments can face directly into one another — so when you open your shades, you’re looking directly at someone else’s bedroom — are correct. I can see how this would be a bit off-putting, although it was not a showstopper for me. As a rule of thumb, if you’re looking for a place where you can have a cup of coffee while enjoying a Mexico City vista, or a pleasant street scene, this isn’t it. But if you’re looking for a place that’s well-situated as a base for exploring the city — and getting your vistas elsewhere (for example the rooftop terrace!), it is.
All in all, this is on my list of places to stay when I come to Mexico City next. It was a good trip in a great location. Once ULIV knocks out the details listed above, this will be my 100% go-to.