To sum things up, the Lian Li x DAN A4-H2O is a compact, simple SFF chassis that will work well with run-of the mill AIOs. It doesn't offer the flexibility we have recently seen from other SFF units, but manages to drive home the understated and functional minimalist focus quite nicely.

That minimalist theme starts on the outside with a lack of rounded corners, diamond-cut edges or power/HDD activity LEDs. That is by no means a bad thing for those who like things as clean as possible. On the interior, you are also given one specific path forward with little choice or flexibility. That singular approach is not negative either, but a bit of a departure from other SFF cases that at least provide some wiggle room, like providing more storage options with a smaller PSU form factor or more compact AIO and spinning rust.

The A4-H20 doesn't stray from its intended path at all and the result, if you follow its lead, is both functional and lacks any nasty surprises, which can be a strong point for this case. In other words, if you have an ITX board, Asetek-based 240 AIO, and GPU shorter than 335 mm, there is little additional thought or research required to confirm that everything will fit.

In terms of pricing, it feels a bit expensive considering something like the Lian Li Q58 with PCIe 4.0 actually has a lower MSRP than the A4-H2O with the same interface standard. That seems odd, as the Q58 offers a slew of more functional features and a more interesting material mix.

The main reason the A4-H20 is recommendable is its compact size. By eliminating layout choice and not going beyond core functional features, you are left with a tiny 11 L chassis that can hold and keep cool a potent gaming system. That tiny footprint is what drove early adopters to this case segment to start with, so it is nice to see a version that aims to keep things as small a form factor as possible. For that and its simplicity, we can see people paying the slightly higher asking price compared to some more feature-rich variants, even ones from Lian Li itself.