Whilst the target of many architectural critics, the building is notable for its massive glass roof, which makes it the largest glass-covered enclosed area in Europe.

[3] This was closed in 1999 when a refurbishment programme (initiated to compete with the newer Buchanan Galleries complex), saw it being replaced by more shops and an enlarged restaurant area.

The Argyle Street exit was demolished and rebuilt with an extended mezzanine level housing a TK Maxx store (now closed), and additional shop units with new escalators to serve them.

In line with the extensions, the original 1980s floor tiling was replaced and the escalators at both ends of the main mall were moved to different locations and renewed.

Initially, the shopping centre is aiming to tender to a more upmarket niche to compete well with the high street and rival mall Buchanan Galleries.

In 2010, the Debenhams department store announced that they would be undergoing a renovation as part of the centre's development, including a premier restaurant.

Demolition of the existing centre will take place in phases over an expected timeframe of 15 to 20 years, aimed at allowing retailers, restaurants and leisure operators to stay open throughout.