We've reviewed quite a few Acer monitors, including several very nice ones, but they've all been screens with TN panels. They recently began developing monitors with IPS panels, and the first one we got our hands on is the Acer S275HLbmii. It's a 27-inch model priced around £233.
The S275HLbmii falls in the same price segment as the recently reviewed LG IPS277L-BN and the ASUS Designo MX279H. That's not the only similarity with those monitors, because it looks like they all employ the same panel made by LG.Display. This panel is used by a number of different manufacturers.
It doesn't necessarily mean that the products are identical, because the other hardware components and software features can differ significantly. Acer has tried to distinguish itself, and equipped the S275HLbmii with a shiny, dark plastic plate (it doesn't look like glass anyway). The models from LG and ASUS have non-glare screens with an anti-reflective coating.
It's a matter of taste, some like glossy screens that appear to have higher contrast and more saturated colours, others don't like reflections and will prefer the ASUS and LG screens.
Like the ASUS and LG models, this is a 27-inch display with a resolution of 1920x1080 pixels. That equals 81.59 pixels per inch, significantly less than the 90+ ppi you get on a 23.6- or 24-inch screen. It may bother some, but in games it can add to the immersion to sit close to a large monitor. In fast-moving scenes you won't notice the individual pixels very quickly. If you have poor eyesight or sit further from the screen, the fact that everything is larger can be an advantage. However, if you're yearning for a retina-like PC monitor, you're better off with a smaller monitor and/or higher resolution.
It's not a clear-cut choice, because a quality 23- or 24-inch monitor with IPS panel easily costs £200. One with an ergonomic and adjustable base quickly costs around £300, with some exceptions. Then there is the 27-inch WQHD (2560x1440 pixel) monitor, that costs more than double that of this Acer screen. It's fairly sizeable gap between that model and the 23/24-inch monitors, and Acer is positioning itself in precisely that whole, following the example of LG and ASUS.