You can go for a if it is offering good value for the money. To elaborate, the professional working on the assignment should have the required qualification. He should have deep knowledge of the topics related to the assignment. The assignment should sound professional in such a way that you can secure good marks through it. If these criteria are fulfilled then it’s worth going for a cheap assignment service. On the other hand, if somebody is offering an assignment service with the worst quality, then stay away from it.