On the plus side it is pretty accurate, I've compared it to my Drayton +3 digstat which i believe is an accurate thermostat. They are usually within 0.5 of a degree of each other if not bang on. The solar cells work well day and night. Max and min are useful if you require that functionality. The suction pad works well on clean flat glass. Moist it a tiny amount.
On the minus side the product was described as a window thermometer, it is, but only internally for a greenhouse. This is mentioned but obfuscated by calling it a window thermometer then saying suitable for greenhouse rather than internal greenhouse thermometer. The see-through effect is unnecessary as it makes it hard to read.
Technical Details
Digital Window Thermometer - solar powered, waterproof
Daily max/ Min record display
Temperature trend indicator
Wind range of temperature -25c to 59.5c C & F option
Suction cup for window or glass door, ideal for greenhouse, propagator
If anyone buying this is thinking they can stick it on a house window externally and read the external temp from the warmth of their house they are mistaken. The suction pad is on the wrong side for that and is not rotatable.
I'm thinking of sending it back.