Bought this for working through "Electronics for Dummies" and it's okay for this purpose, certainly for the price. Very small, only 10cm long, 4cm wide, and 2cm deep, and light (60 grams), so fits in your kit box. The small size is nice, but means the dial is a bit fiddly, so might be a problem if you have large hands. Also, the unit tends to move around if you pull on the leads.
Good basic feature set -- measures resistance, current (up to 200 milli-amps, enough for hobby electronics work), and voltage. Not auto-ranging, so you have to pick the relevant range to measure. The accuracy is not high, +/- 2.5% + 10, but this is also okay for hobby work.
It has a beeper for continuity testing, which is nice and usually only available in more expensive units.
Build quality is okay for infrequent use, but would probably crack if dropped on a hard surface. The display is very clear and easy to read, and not too small. The dial labels are on a sticker, but it seems well put on. The leads are a disappointment, with bendy thin rubber plugs, short grips, no caps, and poorly machined tips, but they work and are acceptable for the price.
Uses a weird battery, a 12-volt size called A23. The unit comes with one, which you have to install first (requires unscrewing the back of the case).
Note that this unit does NOT test transistors, as the description claims. It does have a function for testing diodes, though, as well as settings for testing 9v and 1.5v batteries (although you could just as well use the voltage test for this).
In summary, absolutely fine for learning about electronics, and well worth the price of under £5 including delivery. However, if I become serious about electronics, I would probably get a more accurate unit with better features and build quality.