Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Pretty good phones

I've had this phone system in service for about 3-weeks. I gave it an overall rating of 4 stars because of two (for my use) significant shortcomings.There a several excellent features which include ringtone's and ring-melodies. Each instrument can have it's own distinctive "ring" - or none. The best feature is that you only need to program one phone, and copy all, or selective telephone numbers to the other phones. Very impressive. The clarity of conversations is also excellent, but the volume is limited in both the answering system and hands-free functions. The volume cannot be raised to a comfortable listening level in either of these functions.The other shortcoming is that there is no audible alert for new messages on the answering system. There is a average brightness LED that flashes when a new message has been recorded, but that LED is not really noticeable in common ambient room lighting.