Actual Useable Storage Capacity of Clip?

What is the actual useable storage capacity of the clip if used exclusively for MP3 songs in MTP mode?  If I put over about 1.8 gig on my m250 which was rated at 2 gig, it would work OK for about a week and then start locking up.  Does the Clip do this?  Is there a reccomended limit of songs, either number or bytes, for a 2 gig Clip?