Ambient filter ports are often criticized for their fragile plugs, which are small, clear, and easily lost or damaged.

Some users find Ultimate Ears' inability to repair models from 2016 surprising, indicating potential issues with long-term support for older products.

Laser scanning for fit can be problematic; multiple owners experienced discomfort despite scans, requiring replacements and adjustments.

Some owners found better fit results by specifying "musician’s monitors" to audiologists and ensuring impressions go past the ear canal bend.

Refits may be necessary due to shallow impressions; using UE’s spec sheet during the impression process can improve fit accuracy.

Certain users experienced improved fit by having impressions done without a bite block, especially if they primarily use IEMs with a closed jaw.

Despite bass-focused design, UE11s deliver clear mids and highs, making them suitable for vocalists as well, not just bassists or drummers.

Owners often need multiple fit adjustments; some achieved better results by precisely describing where material needs to be added.

Persistently poor fit issues led some users to temporarily halt adjustments due to the hassle of repeated refittings while on tour.

Owners report slower customer service response times from Ultimate Ears compared to past experiences.

A shorter cable is recommended over the longer option to prevent it from getting in the way during use.

UE custom IEMs are favored for live performances, with users appreciating their phase coherence and flat response as highlighted in Dave Rat's videos.

UE 5 Pro models occasionally see $50 discounts, but sales are infrequent and not substantial enough to wait for.

A 35% discount on newer models is noted as the highest seen, though it's not applicable to the two least expensive options.

Users express disappointment with Ultimate Ears' support, leading them to consider alternatives like 64 Audio and Noble Audio for better experiences.