Climb inside and the tall stance aids easy entry and exit, good for tall persons and senior citizens. The dashboard design is dominated in a typical logical Suzuki layout, with the huge vertical console dominating the overall layout. The dual tone beige interior looks airy but the overall ambiance lacks the finesse of the vento, and also to a certain extent, the verna, both which use better plastics in comparison.
Unlike the Linea, misaligned panels are thankfully less and part quality is above average. Some good bits like the chrome ringed dials, the automatic climate controls and the parallel chrome bars look high quality and stand out but the power window switches, non leather wrapped steering wheel and gear knob, OSRVM controls and gear knob feel pretty downmarket. Even the dark wood trim looks out of place though thankfully, it has matching doorpads to give it a balanced look. The colour theme is OK but prone to reflections at summer days and the earlier car's black and beige theme looked much better. The AC vents are shared with swift and are a mix of circle and rectangle themes that are carried over to the cabin.
The ergonomics are a mixed back though most controls fall easy in hand. The AC knobs are placed pretty low but the stereo is positioned almost close to the eye level, a good thing. Not so for the USB port, placed directly above the gear lever in the lower part of the console, next to the mobile charger.
The information system on the console shows the date and outside temperature, and sadly, a trip computer, offered in the verna SX, Linea and Vento are missed, but a temperature gauge is thankfully present.
Space and comfort-front
The front seats are high set, and offer good overall lateral support. The fabric looks tasteful and high quality and cushioning is spot on, though the back rest is a bit too stiff for my liking. The upper thigh support is decent but lower back support needs improvement, especially the "H" point. Lumbar support is sorely missed and would have been a boom for long drives. A combination of tilt adjust steering and height adjust seat provide an optimal driving position and the steering isn't set too close to the driver like the linea.
Headroom is phenomenal, even for 6 foot plus occupants, a result of its towering height. Legroom, as expected, is good but the city and vento are actually more spacious and owing to their large seat travels, sitting inside these cars is more comfy. The SX4, in comparison, has limited front seat travel range in order to generate the maximum possible rear legroom, another reason the front seats are high set.
Space and comfort-rear
The rear seat is perhaps not a strong selling point and despite a good angle of inclination and optimal cushioning, its not as comfortable as the ones in the city and vento.
The width is narrow, and the high set transmission tunnel doesn't help. The car is stridently a 4 seater at best and if a fifth person is squeezed, the hard center squab and the armrest won't make him comfortable for long trips. The angle of inclination is good but the base is a bit upright and comprmises comfort, not to forget the squab design, which is just average as far as lower back support is concerned. the side bolstering needs to be more generous and cushioning a bit softer, to aid comfort levels. the centre armrest is standard but again, not comfortable to hold. My TD car had poly packing on them so we did try to remove it but no noticeable improvement was found. Good, but not great either. Even the verna, despite having a low rear seat, is comfortable overall though seat base is flat in it.
Legroom is less than stellar and can be termed as above average, again, the high set seats compensation for the lack of it. Pushing the front seat forward does generate good amount and can be used for a single person who is chauffeur driven. However, traveling wth a family, the vento and verna make for more comfortable diesel cruisers.
Audio:
The ZDI comes with an integrated Kenwood Audio with steering mounted controls,a separate remote, a MP3 CD player, USB and an aux-in jack, but no standard bluetooth. Sound qualit is average with less than steller bass, though mid and treble is OK. Speaker upgrade recommended. Overall a 5/10. The VDi comes sans steering mounted controls. Display is backlit orange and harks old school '80s casio fonts.
Boot Space:
Boot space is deep and well designed and can carry a family's luggage in one go, but inside, suspension towers intrude robbing some useful space area. The rear seats do not split or fold and the high loading sill makes it difficult to upload heavy luggage. The stepney provided is a full size 16" alloy on the ZDi.

Two tone beige dashboard, vertical centre console looks classy.

Close up view of the steering wheel, not as grippy as the Fiat and the vento. Feels cheap too.

Meter cluster legible and easy to read.

Front seats comfy, high set, though legroom above average.

Legroom view, maximum from co-driver side.

minimum front legroom with seats pushed fully front.

maximum and minimum rear legroom.

Driver's side doorpad. Wood finish looks garish.
Storage space for a one litre bottle.

Co-driver side doorpad. Again, storage space for a litre bottle.
Fabric design not so upmarket.

Both rear doorpads get tilt one litre bottle holders.

Boot Space. Note intruding suspension towers.

Above and below: Dashboard views from different angles.