Sarah showed me these at the UKMKIV's V's Cupranet RR day as they had just begun to stock them. Very very good value for money for someone on a tight budget, but the threads aren't stainless and would be more prone to seizing (IMHO) than more upmarket stainless offerings 
Is seizing a common problem or is it rare? Sorry but I don't really know much about coilovers.
Since I'm in college during the week I'm only driving at weekends, would this increase seizing chances?