Make: Canon is by far the favourite printer manufacturer among ABers, so no problems there. (Everyone seems to praise Canon and reports of problems with Canon printers are very rare here in Technology; that certainly can't be said for either HP or Epson).
Model/specifications: It does just about everything that it's possible for an all-in-one printer to do (apart from double-sided printing), so again that's fine.
Reviews: All of the reviews I can find suggest that the TS5050 is up to Canon's usual high standard.
Inks: It uses 5 separate cartridges, which can be more economical (and also produce better printouts, because there are different black inks for text documents and for photos)
Price: Very good for a 5-cartridge Canon printer. (Once in a blue moon you might find a firm selling a 5-cartridge Canon model for only fifty or sixty quid but that only happens when they're clearing their stocks of a particular model. Most suppliers want £80 for that particular one, which is a decent enough price anyway. So the £70 that Argos is charging looks to be a bargain to me)
Availability of compatible inks at a decent price: Sometimes it can be hard to find cheap compatible inks for certain printers (especially when a model is new to the market). However my favourite supplier is currently charging under £20 for a set of all 5 inks
https://www.inkredible.co.uk/canon-pixma-ts5050-ink-cartridges
so there are no problems there.
Buy it!
;-)