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As above, 30m or 25m at a push.
How often I use it will depend on the weather. Last year I hardly used it at all. This year - a lot! Not sure I can accommodate a wall mounted reel. The tap is in a very narrow carport built for 70s-sized cars and I often collide with the boiler flue when squeezing past. Also if I left a hose outside permanently someone would probably knick it sooner or later. I'm sure I will miss the expandable hose but they are notoriously fragile and mine did well to last 4 years.
Higher grade hoses will kink less and be able to deal with higher pressures, but be heavier and pricier. My Gardena Classic seems better than any Hozelock I've used in the past, especially considering the water pressure I have now (I think about 8 Bar!). How long a hose do you need and how often are you coiling / uncoiling it? The 'pro' level hoses will be a pain to coil on a small reel.